BM: Read the linked article, please. Or at least the part I cut and pasted here. Yes, in the past, capitalism has delivered; even when it failed, it was possible to patch the failure and have a modified system that worked.
But the sine qua non of that success is high demand for labor. Capitalism works only when just about everyone has a job. What happens when the jobs go away, or become so low-paying that capitalism no longer delivers? That's the situation we're in now, and it's a new development emerging from technology that didn't exist in the old days, so the failure of capitalism is NEW, and the past is no guide.
As for what should replace it, that's a separate question. I think we can agree that the system Kruschev presided over wasn't better. But something will have to replace capitalism. Exactly what, remains to be seen.