In an effort to "disproportionately" help his friends in the financial sector, Bush signed the Lehman Brothers Bailout Bill. This move, along with his other policies, led to the Derivatives Disaster that nearly destroyed the world's economy.
But that's not all! He also managed to create the Subprime Scandal, where banks gave out loans to people who couldn't afford them, because, you know, that's what banks do.