I think you're greatly confused, as are most people, as to the cause of the meltdown.
The idea that it was the "evil bankers" fault is largely bunk. They certainly played a role, but to sit back and dump on that industry, and that industry alone, is foolish beyond foolish.
And once people accept the fact the government itself had just as much a hand in this mess as the bankers, you can swap out "banker" for "congressman" and "government" for "wall street" and this statement still holds.
Probably because congress wasn't exactly going to police itself, and that is what is required. Nor had any serious and realistic looks into the actually causes of this been done. No, instead it was the same FDR era bullshit of "it was the evil rich people on Wall Street." And people ate it up, and still do, to this day.
Anyone that doesn't blame a banker is called an idiot, a moron, etc etc etc.
Shit, one of the reasons this entire mess was exasperated what the simple fact the bankers were the most responsible parties and insured the bunk debt instruments. AIG, the Fed, Congress and the very people that signed for mortgages they couldn't afford are just as much to blame for this as Wall Street. Yet very few actually get this...
Why don't they? Because we passed shit like "Dodd-Frank" and "solved the problem". REFORM!
If you call making the banks bigger, stronger, more in need of bailouts if shit happens, and tying Wall Street even closer to Government than ever thought possible before, reform.
People that support Dodd-Frank haven't read Dodd-Frank and/or don't understand Dodd-Frank or finance.
We'll ignore the fact it absolutely crushes any small business trying to break into the finance, investing or mortgages. You know, competition that stops "too big to fail".
Making changes, hastily, for the sake of making changes is a shit approach.