The rule under capitalism is you have the best product in the world to raise your customers standard of living at the fastest possible rate or you go bankrupt. Socialism has no such rule. Ever heard of East/West Germany or 132 other examples?? Slow???.
Okay, let's look at Germany. West Germany you had a country that was propped up by Billions from the US to rebuild, they had a system of socialized medicine and social programs going back to Bismarck. German unionization is 18% compared to 10% in the US, they have six weeks of paid vacation...
So Democratic Socialism... works just fine.