Their generation is know for greatly increasing the national debt, not paying their share of taxes and guaranteeing themselves generous retirement entitlements.
They decided that paying for their debts would best be handled by following generations of people.
Billy432212: "M. Teacher, I thought the Baby Bum Generation did have some redeeming qualities."
Nexus 7 Teaching Robot: "You are correct Billy 432212, That generation did make great strides in environmental and civil rights."
Billy432212: "M. Teacher, then why does history look down upon this generation?"
Nexus 7 Teaching Robot: "Because they were bums that didn't pay their bills!"