Governments regularly do terrible things in the banking system: Printing money, capital controls and mind boggling amount of red tape. With this red tape they can punish anyone who disagrees with them.
Oh yeah, all that abhorrent red tape like "If you are a bank you have to prove you aren't doing funny things with people's money" and "if you provide financial services you need to make an honest effort to not fund like, actual terrorists, or north korea" and "We thought we learned our lesson about unregulated stocks back when it caused the great depression"