This also assumes drunks buy new cars, it will take 10 to 20 years before all drunks are using this technology.

What I have read is so many politicians are so afraid of MADD that they do what every MADD wants others MADD publish all the legislation that a politician does not support that MADD is behind. They also go after prosecutors who plead barging with anyone accursed of DUI. They have made it clear if you not for them you are against them and they let everyone know it.