If what you said was true there wouldn't be any companies outside of like the caymans islands. Taxation is not the only thing a company look at when choosing where to go. Sure obviously you can't tax at 100%, but we are currently way lower than we used a few decades ago, so we totally can raise it (actually just go back to what it was even just 10 years ago).

As for the retirement age of 60, you say it is impossible yet it was the retirement age in France until like 15 years ago. Since then we dramatically reduced the taxation on companies and capital gains, and slightly increased the age of retirement. That is to say it is absolutely possible and does not demand big systemic changes, only some adjustments on a few variables.

Also the retirement age until 6 months ago was 62, and projections for the next decades showed the system would be making benefits for a few years, then deficit, then back to benefits later in the century, while keeping everything (tax level, retirement age) the same. The choice was to reduce taxes on companies and capital gains, and raise retirement age, which would end up costing more in like 30 years from now than if we kept the same age (not even talking about not reducing taxation on that point)

We are, as a society, extremely rich. It is just not well distributed thus people think we don't have money for this or that.