Yep. It's all about the numbers. They don't care if good, law-abiding people lose their careers over bogus DUI convictions.
ping
To prosecutors, it’s about closing cases.
They will “bundle” unsolved cases together an write them off (with no additional punishment) to secure a plea bargain in some instances.
It’s happened for over a hundred years but still occurs today.
The more “wins” they can show, the better their performance review.
The tougher they are on crime, the better their political campaigning when they seek elected office (and really, who LIKES drunk drivers?).