So in your ideal government the power (money) belongs fully to the state. But then when a corrupt leader gets into power, he shapes it like North Korea.
The thing about capitalism is that "greed is good". Greed can help promote economic growth, and drive investments. Greed is actually favorable to capitalism. As greed's a somewhat base emotion in many people, this means that greed keeps capitalism running well.
Greed (A base emotion) in socialism/communism can cause the entire thing to collapse.
So, you're saying that the 2008 crisis(and I'm just mentioning the last one), which was caused by greed, was "good".
I don't see how it's any different when you put a corrupt and greedy elite in charge of capitalism, than when you put a corrupt and greedy elite in charge of a socialist state.
For the record, I'm in favour of socialism where decision and policy-making is taken as democratically as possible, so we indeed don't rely on the benevolence of a leader or a small caste. This is why I don't have particular sympathies for the USSR - they did what they could to build socialism under the circumstances and constant aggression/encirclement by capitalism, but didn't really work, and I don't really see it as a model that should be imitated by future socialists.