Because nothing happened when wall street bankrupted the country by gambling and needed to be bailed out in 2008, and then paid themselves huge bonuses.
Very few people actually got punished, but a lot changed since 2008. Executives were forced to step down. Several major players went bankrupt and many more lost 95%+ of their valuations. Anecdotally, I hear that companies are taking compliance much more seriously. HN would call the surveillance at banks today Orwellian if they were more knowledgable about it.