So what? The drunk driving morons would then have to keep paying the banks or finance companies, or if they cannot afford the payments on their confiscated vehicles they can sell their homes or if they need their car for their work then they will have to get another job even if it is just labouring, there are plenty of these jobs in Thailand, and if it is a farang then they should just be allowed to take a job reserved for Thai's until their loans are paid off.
This may seem harsh on these selfish drunken drivers, but it is no more than what they deserve.