>>The 'problem' is banks are limited in what they can do with this money which ends up creating investment bubbles and other market distortions which hurt the economy overall. If you slowly transitioned banks so they could not invest this money over say 100 years the net result would not be harmful.
Um, no. The type of investing you suggest includes the risk of losing the money. This doesn't work with commercial banks because they are insured by the federal government, i.e. the taxpayer. When people put money in the bank they expect it to stay safe. That's why the concept of a bank exists in the first place. If there was the risk of it evaporating due to bad investments, that would basically be more of "privatized gains, socialized losses."
