Banks don't = Government
Often times they're separate entities.
They have a solid reason for it though...
So that the Government doesn't screw up it money. Countries where Gov controls Banks they're fiat pretty dead...
But those banks are than corrupt due not being part of the Gov and as such don't need to take care of people.
The banks job is to make money.
But replace the money with a Decentralized like Bitcoin and one part of the equation is gone.
Money controls the world and if you free the world into a decentralized system, the world can slowly like more decentralized gov or alteast Federation based ones.
Hence why people say if Bitcoin fails the market is dead and dream is pretty much dead. It may recover but after a long time and the energy of hard money of it gone