The same flaw of hubris seen in socialist politicians we see in pretty much all politicians. The primary difference is in scale. The truth is, we don't need central planners or politicians. They are leaches on society at best, and at worst despots leading us to hell. The most anti-communists during the cold war still believed in central planning. You can see it in the US and the UK. Its actually laughable to listen to them. The west has prospered so much due to more free market activity in spite of central planning. That's the most logical explanation I have heard at least.