It's just hiding in the pockets of their union friends, waiting to fund another corrupt Dem election cycle.
You'd lose even if you could find an attorney to take the case. Keep in mind that you would have to prove that the money didn't help the economy (every major indicator says the economy is improving). It would be very hard to prove. In addition, if you sued for the money, you would then need to pay more in taxes and the debt would be another trillion in the hole because the money has to come from somewhere. Most of those trillions went to tax payers in the form of tax breaks.
Suing the government is often a dumb idea. You're essentially suing yourself.