The EU regulators fining of the banks acts a deterrent to the banks from committing more crimes. The U.S. government often lets Wall Street act with impunity. This leads to Wall Street and other banks to act with recklessness and criminality. The 2008 financial crisis was caused by the banks lending out very high interest loans to people who couldn't pay them back and when they couldn't the banks took the customers possessions causing major family and social problems. By the U.S. government not punishing the banks, it is encouraging financial problems for the country.
Yes, banks and Wall Street continue to get away with too much. Recently Wells Fargo was found to have been creating false accounts in order to take advantage of customers. The financial crisis in 2008 was created in large part by banks. If the EU regulators can fine banks over market rigging, the U.S. government should do the same.
In the United States, big banks, such as Wells Fargo, are able to get away with a great deal of abuses that would not be allowed in Europe. Wells Fargo charged its customers with a lot of fees that they didn't need to charge, and that they didn't inform the customers about. They do it on purpose.
Yes, the U.S. government is too lenient toward big banks, and forgives their transgressions way too easily. The U.S. government should follow the example of the EU and impose fines on big banks if they engage in illegal activities such as market rigging. There need to be consequences for these actions.