Unintended Consequences

So I had an epiphany the other day, think of the rule of unintended consequences. The IRS... So to avoid taxes and grow wealth the banks and Wall Street have come up with ever more exotic products in response to government regulations and the tax code.The more they create the greater the risk as well as having many more hands in the process which leaves more money on the table for Wall Street and the banks, and less in our pockets. Would the financial collapse have not occurred if the federal government had stayed out of the system?