There's a fair argument to be made that the Democrats could/should have reversed these disastrous fiscal policies when they gained power, but it's important to be wary of Murc's Law while also acknowledging doing so would also burn a lot of political capital Democrats never seem to have much of.
The American electorate is a grade school child constantly evaluating which parent it likes the most. One tells you that you can eat as much candy as you like and play video games all night (neither of which hit you until the following day), while the other occasionally tells you to eat your vegetables, do your homework, and clean your room.