Here are a list of resources if you'd like to understand the evidence behind my opinions:
Philip Davis, E. (2005). Challenges Posed by Ageing to Financial and Monetary Stability*. The Geneva Papers on Risk and Insurance - Issues and Practice, 30(4), 542–564. http://doi.org/10.1057/palgrave.gpp.2510048
Nelson, R. M. (2011). Sovereign Debt (SD) in Advanced Economies: Overview and Issues for Congress. DIANE Publishing Company. Retrieved from https://books.google.co.nz/books?id=yKy9y_q3bXAC
Dieckmann, S., & Plank, T. (2012). Default Risk of Advanced Economies: An Empirical Analysis of Credit Default Swaps during the Financial Crisis. Review of Finance, 16(4), 903–934. http://doi.org/10.1093/rof/rfr015
Gertler, M. (1999). Government debt and social security in a life-cycle economy. Carnegie-Rochester Conference Series on Public Policy, 50, 61–110. http://doi.org/10.1016/S0167-2231(99)00022-6
Wray, L. (2012). Global Financial Crisis: A Minskyan Interpretation of the Causes, the Fed’s Bailout, and the Future (No. 711). Levy Economics Institute. Retrieved from http://www.levyinstitute.org/pubs/wp_711.pdf
Crotty, J. (2009). Structural causes of the global financial crisis: a critical assessment of the “new financial architecture.” Cambridge Journal of Economics, 33(4), 563–580. http://doi.org/10.1093/cje/bep023
Stierli, M., Shorrocks, A., Davies, B., Lluberas, R., & Koutsoukia, A. (2015). Global Wealth Report (No. 7). Credit Suisse. Retrieved from https://publications.credit-suisse.com/tasks/render/file/?fileID=F2425415-DCA7-80B8-EAD989AF9341D47E
Piketty, T. (2014). Capital in the Twenty-First Century. Harvard University Press. Retrieved from https://books.google.co.nz/books?id=T8zuAgAAQBAJ&printsec=frontcover&dq=piketty&hl=en&sa=X&redir_esc=y
Brucker, E. (2006). Demographic, Employment, Expenditure, and Income-Related Dependency Ratios: Population Aging in the Fifty States. Public Budgeting and Finance, 26(3), 65–80. http://doi.org/10.1111/j.1540-5850.2006.00855.x
Kluge, F. A. (2013). The Fiscal Impact of Population Aging in Germany. Public Finance Review, 41(1), 37–63. http://doi.org/10.1177/1091142112439225
Kakabadse, A., & Kakabadse, N. (2011). Global Elites: The Opaque Nature of Transnational Policy Determination. Retrieved from https://books.google.co.nz/books?id=KcPRAQAAQBAJ&printsec=frontcover&dq=Global+Elites+:+The+Opaque+Nature+of+Transnational+Policy+Determination&hl=en&sa=X&ved=0CBsQ6AEwAGoVChMIta232umtyAIVgh6UCh3_HwCL
Morck, R. K. (2007). Concentrated Corporate Ownership. University of Chicago Press. Retrieved from https://books.google.co.nz/books?id=KMwCmdbQtQIC
Davey, J. D. (2012). The Shrinking American Middle Class: The Social and Cultural Implications of Growing Inequality. Palgrave Macmillan. Retrieved from https://books.google.co.nz/books?id=0eHFAAAAQBAJ