Where the Soviets commandeered an entire economy, however, Western progressives have had to piecemeal it, taking over a sector at a time. That's where the term (maybe it's obsolete today) "creeping socialism" came from. It's been wildly successful because in government there's no shortage of creeps.
Well, we can see the future too. And depending on the goal, it can even be said to work. If the goal is to kill off the people entrusted to its care, the socialized British medical system is a morbid success story rivaling Stalin's Ukrainian genocide, in indifference if not in scope.
Cure patients of their ills? Conquer disease? Mend the wounded? Apparently, the British medical system can't even keep their patients fed and hydrated.
The good news for liberals, progressives, and socialists is that, with today's technology, they will be able to determine beforehand who deserves quality health care and who doesn't. Why, no sense wasting government benefits on their bitter and outspoken critics. Need a new kidney? They'll fix you right up. But first they might want to call the NSA. Wouldn't want to waste a kidney, so to speak, on a conservative troglodyte. Good thing Obamacare will be administered by the IRS. They have experience in meting out fair, impartial, objective, and unbiased punishment on those who stand in the way of progress.
Socialized medicine, coming to an America near you.