Because the banks know that once they legalize it, They wont be able to launder money for their Cartel friends and that stops them from making a huge profit. Its all about money to them.
I'm thinking the shareholders of private prisons are more complicit than the banks. Our failed marijuana policy puts a great deal of people.in jail and subsequently generates a lot of federal funding. If this ever dried up, that particular industry would evaporate overnight, and the are REALLY entrenched. We had started to peel back our reliance on private prisons towards the end of Obama's administration, but Trump has signaled.the opposite, a more aggressive stance on marijuana recreationally, and the decision to continue using the private prison system.
Stocks for private prisons soared after he won. It's a bit telling.
