Are there examples of countries that have successfully implemented the practices outlined in the content?

Yes, there are examples of countries that have successfully implemented the practices of social security economics. One such example is the United States, where over 99% of social security's revenues go toward benefits and less than 1% for overhead. This is in contrast to countries with privatized systems, such as Britain and Chile, where management fees are higher and government spending is still necessary to avoid widespread poverty among the elderly.

The theme of social security in 'Arguing with Zombies: Economics, Politics, and the Fight for a Better Future' is highly relevant to contemporary issues and debates. The book discusses the economics of social security and compares it with privatized systems in countries like Britain and Chile. It highlights the inefficiencies and risks associated with privatized systems, such as high management fees and the necessity of government spending to prevent poverty among the elderly. These discussions are pertinent to ongoing debates about the sustainability and effectiveness of different social security systems.