Here's the thing if you get arrested for a DUI the process is totally unconstitutional. You are guilty until proven innocent.
I was arrested pulling into my driveway, I had 4 beers (I had my receipt with me) over a 4 hour period....I blew a 0.168 which is pretty much impossible based on that alcohol level unless there is blood in your mouth I found out and that morning I ran into a shelf that totally opened up the inside of my lip, pretty bad. It was one of the reasons I didn't drink so much that night, everything tasted like blood.
You are also forced to spend at least 8 hours in jail which in reality is more like 16.
You'd think it's be an easy case, however, most lawyers will only plead you guilty for less than $5,000....they are hoping there is some glaring misconduct, but usually there is not. For a real defense you are going to have to put up about $10,000 per trial (there can and probably will be about 3), you will also have to actually hire an expert and they want about $2,000-10,000 per day + expenses....using their book or a scientific write up is no good, an expert must be present.
The next thing is your license is suspended until the trials are over...this can take at least a year, more than likely about 1.5 years start to finish (sometimes up to a year for just the first trial).
My choice was to pay about $4k in all the fees, classes, etc and be done with it and hope not to get another one ever. The worst 'case' in my class was a New York or New Jersey guy...he just bought a $50,000 car cash and was in his garage detailing it up and having a beer....they arrested him for drinking while driving and impounded his car (permanently)...he tried to defend himself and it cost him about $50,000 also....+ a ton of other costs he had....he was over $150k.
MADD has a powerful lobby, it's hard to say no to a mother showing her messed up kid, but the bottom line is it's about the political power for other issues.