There have been 17 attempts that I'm aware of to create a government based off of the ideals that Marx preached.
Of those 17 attempts, every one has ended up creating extreme poverty for the masses. Every one has led to massive amounts of death and abject misery. Every one has led to a dictator that sees his people as just cogs in a machine, easily replaced.
No matter how great Marx's system is (and having seen the aftermath personally of one of those attempts to enact it, I'm inclined to think that his system of thinking is semi-articulate garbage), it's obvious that we can't do what he prescribed and get the results he claimed we would.
Frankly, the part where all of the power temporarily concentrates before redistribution is the problem area: no one can withstand the temptation to just keep it.
Or possibly they never intended to let it go in the first place.