The government went after the robbers, but it also imposed a host of regulations on the bankers during that era, because otherwise people would not have trusted the banks with their money. We need people to trust banks with our money, because money that is unemployed, that isn't doing anything, might as well not exist.
For every action, there is an equal and opposite reaction. The reaction to what JPMorgan Chase did in the commodities market has just started. For honest banks, the result won't be pretty.
At the time of publication, the author had no investments in companies mentioned in this article.