Until and unless there are real major personal consequences for Federal officials, this will continue. Some of these functionaries need to be picked up and thrown in prison for contempt of court and left to contemplate a long life through a small window until they come clean.
I can think of only one solution: The AG’s of states whose citizens were targeted could launch criminal investigations against these IRS creeps and their 0bamao protectors and enablers.
It would take guts to do it though - guts the current crop of GOP weenies are demonstrably lacking. Now, if we had a 100 Trey Gowdies, instead of just one, things might get interesting.