It’s a common refrain for victorious politicians who campaigned on promises of roads paved with gold and ponies for all.
Once they get into office, they realize, to their horror of course, that their predecessors had patched together the budget with duct tape and Laffy Taffy. There’s no money to be had.
“We didn’t know how bad it was!” they exclaim. And then they explain there will be no ponies as promised.