People are realizing that we as a society are faced with a horrible moral and political dilemma. The moral ideal is Socialism and yet where ever it is tried consistently it fails. Our moral evil is Capitalism and yet where ever it is tried it leads to material success but moral decay. So the dilemma of our age is a moral-practical dichotomy that no one seems to be able to resolve. It is understandable that people like Simon issue a call to double down on the moral ideal of Socialism, that's what morality is for, to tell us what we should do. But his "solution" is that maybe we can make it work this time if we don't impose Marx's dictum too consistently. Maybe this time "need" won't expand beyond all bound and "ability" won't vanish. This time.
This approach will fail too. To escape our dilemma we need to question our morality instead of imposing another Socialist failure in America. I hope we can avoid this fate but I am not optimistic. If you are sincerely interested in these issues then I urge you to read two books by Ayn Rand; Capitalism: The Unknown Ideal and The Virtue of Selfishness.