Some states do have mandatory jail time for 2x offenders.
QFT, I agree no one should get 2 DUI's within their cool-off period.
Sadly some states have made .10 a "high penalty" level.
Also most states put a freeze on your license (on top of $1,000's in penalties) that you can't drive even to work for the first 90 days. Most are only 30 for work and 90 for any thing else.
Some impound you vehicle.
All that said, you actually also do not need to be driving to get a DUI.
I would suggest those that believe in this system whole-heartedly to sit down with a DUI defense lawyer or go to one of the many classes DUI arrestees have to take and learn the real story.
I got nailed for a DUI just pulling into my parking space. I blew an insane level that could not have been correct. I am over it all, I paid out my fines and took on the free education.
There was a major NYC public defender in my DUI classes that got popped washing his brand-new Corvette in his drive way while having beers. He wasn't going anywhere that day and just was enjoying his car. Some of the cops he defending against showed up and arrested him. Since he had his car keys within 'distance' it showed 'intent to drive' based on the law. He was arrested, his vehicle confiscated and he moved to Florida.
At the time he was spending big bucks trying to change the laws, I don't know what happened to him as we were not friends. In any DUI class, they have you write on a board "How much has your arrest caused you?" He was the highest. He wrote $100K+ and then one new Corvette below that.