You either have some guys in charge managing things, or you attempt a distributed/mob rules mentality in regards to policies and legislation. Either way in a socialistic system the government is THE governing body, and there aren't really any checks and balances other than the very body managing it. Which goes back to the question of whether or not you can trust the government.
IMHO the debate between the extreme right and extreme left is more about philosophy than policy.
Secondly checks and balances are arguably anti-socialism even, because it would introduce a backdoor/round-a-bout way of enacting rule that wasn't endorsed and driven by the people. So no, the lack of checks and balances isn't just a Soviet Union thing, it's a socialism thing, otherwise it isn't true socialism.
Equating "government subsidized healthcare" with "authoritarian regime" is just arguing in bad faith on your part.