The most flagrant frauds have been legalized by the bought-off politicians. For example, I'd call the Fed giving money borrowed against Treasury bonds to banks

The most flagrant frauds have been legalized by the bought-off politicians. For example, I'd call the Fed giving money borrowed against Treasury bonds to banks so that they can inflate the values of their holdings by buying shares, thus inflating the price quite artificially, nothing but fraudulent manipulation of the market. However, this kind of behavior seems to be quite legal...