May I point out something regarding the “Protestant Work Ethic”? From wikipedia:
When I think of societies that don’t care about the poor, I immediately think of Scandinavia ;).
Anyways, even if you believe that Calvinism has focused on wealth as a sign of God’s favor, the Protestant Work Ethic indicates that you must gain this wealth through work. Idle richness was frowned upon, as one did not work for the wealth that has been received through the hard work of that person’s ancestors - predestination isn’t hereditary after all ;). (therefore, using the view of the OP, one may look at the re-distributive policies of Scandinavia of having its roots in Calvinism)
And let’s be honest, there are many countries that have far more extensive Calvinist roots than the US. These countries include Switzerland, the Netherlands, and Scotland (which is more part of a country, but is fairly distinct). Their viewpoints don’t seem to fit the assertions of the OP at all.