Suggest you start here: https://en.wikipedia.org/wiki/Liberalism.
The first section of your article after the Introduction is "Etymology and definition," which states:
the meaning of the word liberalism began to diverge in different parts of the world. According to the Encyclopædia Britannica: "In the United States, liberalism is associated with the welfare-state policies of the New Deal ...
The New Deal is what reshaped the United States for the purpose of saving capitalism from itself.
whereas in Europe it is more commonly associated with a commitment to limited government and laissez-faire economic policies".[29] Consequently, in the United States the ideas of individualism and laissez-faire economics previously associated with classical liberalism ...
Therefore, your link only serves to support my point. And it continues:
Liberalism in Britain was based on core concepts such as classical economics, free trade, laissez-faire government with minimal intervention and taxation and a balanced budget.
And under the heading, "Liberal economic theory," "Main article: Economic liberalism" :
Adam Smith's The Wealth of Nations, ... Smith wrote that as long as supply, demand, prices and competition were left free of government regulation, the pursuit of material self-interest, rather than altruism, would maximise the wealth of a society[91] through profit-driven production of goods and services. An "invisible hand" directed individuals and firms to work toward the nation's good as an unintended consequence of efforts to maximise their own gain. This provided a moral justification for the accumulation of wealth, which had previously been viewed by some as sinful.[90]
Smith assumed that workers could be paid as low as was necessary for their survival, which was later transformed by David Ricardo and Thomas Robert Malthus into the "iron law of wages". ... Government should be limited to defence, public works and the administration of justice
Malthus claimed that population growth would outstrip food production ... The poor were in fact responsible for their own problems which could have been avoided through self-restraint.
Utilitarianism was seen as a political justification for the implementation of economic liberalism by British governments, an idea dominating economic policy from the 1840s. ... it was mainly used as a premise for a laissez-faire approach. ... While this could be interpreted as a justification for state action to reduce poverty, it was used by classical liberals to justify inaction with the argument that the net benefit to all individuals would be higher.[102] His philosophy proved to be extremely influential on government policy and led to increased Benthamite attempts at government social control, including Robert Peel's Metropolitan Police
If you bother to read the many economics sections of your linked article, you might notice that the text links keep pointing to other wiki pages where the side bar says, "> Suggest you start here: https://en.wikipedia.org/wiki/Liberalism.
The first section of your article after the Introduction is "Etymology and definition," which states:
the meaning of the word liberalism began to diverge in different parts of the world. According to the Encyclopædia Britannica: "In the United States, liberalism is associated with the welfare-state policies of the New Deal ...
The New Deal is what reshaped the United States for the purpose of saving capitalism from itself.
whereas in Europe it is more commonly associated with a commitment to limited government and laissez-faire economic policies".[29] Consequently, in the United States the ideas of individualism and laissez-faire economics previously associated with classical liberalism ...
Therefore, your link only serves to support my point. And it continues:
Liberalism in Britain was based on core concepts such as classical economics, free trade, laissez-faire government with minimal intervention and taxation and a balanced budget.
And under the heading, "Liberal economic theory," "Main article: Economic liberalism" :
Adam Smith's The Wealth of Nations, ... Smith wrote that as long as supply, demand, prices and competition were left free of government regulation, the pursuit of material self-interest, rather than altruism, would maximise the wealth of a society[91] through profit-driven production of goods and services. An "invisible hand" directed individuals and firms to work toward the nation's good as an unintended consequence of efforts to maximise their own gain. This provided a moral justification for the accumulation of wealth, which had previously been viewed by some as sinful.[90]
Smith assumed that workers could be paid as low as was necessary for their survival, which was later transformed by David Ricardo and Thomas Robert Malthus into the "iron law of wages". ... Government should be limited to defence, public works and the administration of justice
Malthus claimed that population growth would outstrip food production ... The poor were in fact responsible for their own problems which could have been avoided through self-restraint.
Utilitarianism was seen as a political justification for the implementation of economic liberalism by British governments, an idea dominating economic policy from the 1840s. ... it was mainly used as a premise for a laissez-faire approach. ... While this could be interpreted as a justification for state action to reduce poverty, it was used by classical liberals to justify inaction with the argument that the net benefit to all individuals would be higher.[102] His philosophy proved to be extremely influential on government policy and led to increased Benthamite attempts at government social control, including Robert Peel's Metropolitan Police
If you bother to read your linked article, you might notice that the text links keep pointing to other wiki pages which say, "Part of a series on Capitalism." This even includes the Wikipedia page for economic liberalism. ":
Today, economic liberalism is also considered opposed to non-capitalist economic orders such as socialism and planned economies.[4] It also contrasts with protectionism because of its support for free trade and open markets.
Economic liberals commonly adhere to a political and economic philosophy which advocates a restrained fiscal policy and the balancing of budgets, through measures such as low taxes, reduced government spending, and minimized government debt.[5] Free trade, deregulation of the economy, lower taxes, privatization, labour market flexibility, and opposition to trade unions are also common positions.[6] Economic liberalism follows the same philosophical approach as classical liberalism and fiscal conservatism.[7]
Arguments in favor of economic liberalism were advanced during the Enlightenment ... It was first analyzed by Adam Smith in An Inquiry into the Nature and Causes of the Wealth of Nations (1776) which advocated minimal interference of government in a market economy, although it did not necessarily oppose the state's provision of basic public goods.[8] In Smith's view, if everyone is left to his own economic devices instead of being controlled by the state, the result would be a harmonious and more equal society of ever-increasing prosperity.[3] This underpinned the move towards a capitalist economic system in the late 18th century and the subsequent demise of the mercantilist system.
Private property and individual contracts form the basis of economic liberalism.[9] The early theory was based on the assumption that the economic actions of individuals are largely based on self-interest (invisible hand) and that allowing them to act without any restrictions will produce the best results for everyone (spontaneous order)
[A]t the center of classical liberal theory [in Europe] was the idea of laissez-faire. To the vast majority of American classical liberals, however, laissez-faire did not mean no government intervention at all. On the contrary, they were more than willing to see government provide tariffs, railroad subsidies, and internal improvements, all of which benefited producers. ... See also [edit] Capitalism
Ring a bell?
So yes, The Guardian is a right wing publication because of its official support for liberalism.
In short: https://youtu.be/H99GErf-nBI?t=978