Madoff, for instance, moved from Wall Street into a cell where he belongs, refuting the above headline. His regulators, however, weren't even charged with anything AFAIK. That despite their inaction for many years being either criminal negligence or the result of being bribed.
(From http://www.bloombergview.com/articles/2014-01-07/jpmorgan-pa... - "The government regulators, led by the Securities and Exchange Commission, also didn't catch Bernie Madoff, even though they were his regulators and that was literally their job. And while yes JPMorgan ignored some red flags, so did the SEC. Like, the many many credible letters they got to the effect of "Bernie Madoff is a big ol' Ponzi scheme." Should the SEC be paying an even bigger penalty than $1.7 billion?")