I know the difference between pensions and social security. I also know that some of the commenters in this thread are talking about pensions without distingui

I know the difference between pensions and social security. I also know that some of the commenters in this thread are talking about pensions without distinguishing between public and private pensions. I also know that there is an enormous amount of capital in the form of public pensions and that public pensions are often invested with relatively few restrictions compared to private pensions. (At least in the US?)