Socialism is not the pioneer of a better and finer world, but the spoiler of what thousands of years of civilization have created. It does not build; it destroys.
The Social Security program will have to be either inflated away with increasingly worthless dollars or Congress will have to intervene to cut benefits.
Government statistics on worker productivity combine many errors of aggregation such as "average prices" and the total purchasing power of money. So it's unlikely that productivity numbers tell us much that's useful.
Smaller countries have often been shown to perform better than large countries in terms of overall income and in economic growth. Also, their populations often enjoy more healthy and safe social environments.