Well... yes, the main point/premise of your argument is ABSOLUTELY correct:

Citizens and tax payers around the world, are essentially funding religious organizations, in part, due to the tax break those organizations receive.

BUT... is that necessarily a bad thing, in all cases?

Here are a few quick thoughts I have had on this topic in the last few years:

1)

Firstly, whether we like it or not, religion and spirituality is very much a core part of what it means to be human.

2)

Most western governments provide some form of financial assistance to those other aspects of life, that help make us "human", such as art, culture, education, and yes: even religion.

3)

For example, I currently live in Canada, and throughout the 1990's the Canadian Government, and various provincial governments, provided a series of rather large grants to the arts at that time, which helped produce a strong burst of Canadian artists, that achieved some great artistic works.

4)

And so, the grants and prize money given to artists, successfully helped fuel the next level of great literary and artistic achievements in many cases, including for example, in part: Cirque du Soleil, as well as several incredible literary-novels that won prizes all around the world in the 1990's, and are still studied intensely in literatures classes, such as "The English Patient", etc...

5)

Unfortunately, the current conservative government in power has cut back on most of those grants and funding to the arts throughout most of the early 2000's, and wouldn't you know it: the amount of literary and artistic works achieved plummeted.

And so, instead of great musical art, the world is now stuck with derivative-drivel in the form of "Justin Bieber" as our only recent significant contribution to world-art when it comes to music!

5)

But... yes, some of these great works of literature, art, music in the 1990's would have ended up being produced, even if the artists had not previously won big prize-grants from the government... but many of them would have never happened.

6)

SIMILARLY, in terms of religion, I have seen how so many religious groups in my region of the country, have helped the poor, including struggling single mothers, in which the father has abandoned the family, etc...

7)

For example, although I do not attend church, I heard from one of my neighbors, last Christmas (2013), the church in our neighborhood, wanted to assign people in our neighborhood to kids-in-need.

So under this church program, essentially, we had to meet with a particular "child in need", and talk with them, and the family, and see what they might need to improve their chances in life, and help them see more hope in breaking free from their family's cycle of poverty.

So my girlfriend and I, decided to join this endeavour, and were assigned to a particular poor family in our region of the city.

We ended up buying the family a computer, and tablet for the teenage girl, and it has changed her performance in high school very DRASTICALLY.

There were also some kids that were going to school extremely hungry, not receiving proper meals, so with the guidance of the church, we identified those families, and helped make sure the kids at least had basic meals and nutrition each day.

8)

Finally, even if you just put aside the notion of "good deads" and helping the poor, I believe there are many important, profound ideas that originate from many religions.

For example, I once spent a few weeks with an Inuit (Eskimo) tribe in Canada's far North, to learn more about those people, and I was really amazed at how spiritual and respectful they were to animals, even though they have to hunt animals a few times per year, to meet their dietary/survival needs.

They had HUGE and EXTREME respect for any animal they killed for meat, conducting a rather lengthy ceremony to thank the spirit of the animal...

I really think we can learn a LOT from their religion, just as we can learn a lot of wisdom from many other religions as well...

Anyways... I've typed too much, so I'll stop there.

But, in short...

I strongly believe Western Civilization is wealthy enough, that we need to fund important endeavours, such as art, some religion/spirituality, and especially: scientific and technological exploration/missions.