Just be careful that “prosperous” is actually the metric you care about and that you some sane way of measuring said prosperity as it applies to everyone.

For myself as a Canadian, I can see that America is more “prosperous” in the sense that the averages look good, but I’ll take my socialized medicine and higher education thank you very much.

It's hard to ignore the astounding success of the free market when it's applied.

The immigrants to the US were pretty much people with nothing but a suitcase. With the American free market, the country rose from subsistence farming to superpower. Scores of millions of people were lifted out of poverty into the middle class and beyond.