Particularly during the postwar New Deal Era.
The New Deal was a series of small socialist tweaks to our capitalist system.
(1947-1980)
Our economy was the strongest on Earth, upward mobility in the middle class was unparalleled, cost of living was a fraction what it is today, wages in real terms (adjusted for inflation) kept pace with costs, health care, higher education, housing, even cars, all of the big ticket items were within reach of almost anyone who simply worked a typical forty hour week.
And yet Ayn Rand, in 1959, chose to rant and whine about how our system sucked.
Mike Wallace asked her to pinpoint what was wrong with what he termed "our modified, regulated capitalist system".
Twenty years later, our fall from grace began, and middle class life has never recovered.
We started taking that crackpot seriously.
Capitalism became anarcho-capitalism.
The US will never ever be socialist.
First, even if pure socialism were totally benign, which it isn't, we'd screw it up because we have zero experience with it. We've been capitalist from the very beginning, so it's best to just add the few tiny tweaks to what we have and leave it at that.
Second, hybrids represent the kind of genetic strength found in Nature.
Purity is anathema to genetics, art, music, literature, even cuisine, and certainly to economics.
Purity is the road to defects. Purity is fundamentalism.
We'll never ever be socialist but the few small socialist tweaks we used in the New Deal Era strengthened our capitalist system.
Removing those tweaks in favor of "trickle down", Randian libertarianism and other dogma has ruined the economy.
The object lesson: If it ain't broke, don't "fix it".
What we had in the New Deal Era wasn't broken, some folks just got too greedy, folks at the top of the food chain, that is.