You nailed it.
"Good business done well can prosper if the cheaters are caught and prosecuted."
The problem is the government no longer regulates the financial markets for the betterment of the nation.
They have become part of the problem through market manipulation and laws that are designed to allow shadowy behavior and prevent regulators from enforcing sound banking rules.
There is little enforcement and even less prosecution because much of what used to be illegal is now normal business.