Who would have thought they'd actually give money to a bank!
A joke about the bank bail-outs during the 2008 recession. Banks made a bunch of risky loans, and then were bailed out by the federal government despite their bad behavior. This joke pokes fun at the idea that the bankers feel they tricked the government as they walk out of congress with piles of cash. The irony is that banks have a lot of money, which is the contrast the caption points to.