Just ending it and putting the gold standard monetary system back would be even better than controlling it. The gold standard brings stability and sound money. Switzerland for example, has a system close to a gold standard, since they have a lot of gold reserves.
Hmm nationalization of all banks is crazy in my opinion, the government can't and shouldn't run an entire sector. What we need is more regulation, and start by putting back the regulations that existed before, like distinguishing between commercial and savings banks.