"People are clearly not going to stop drinking and driving" is such a strange statement to make in defense of DUI stops. Doesn't that imply that DUI stops don't help matters?

At any rate, the solution is to fire all of the corrupt cops and strictly enforce ethical and legal rules. Everything considered to be evidence needs to have an actual scientific basis for it. No more arresting people for being drunk because an officer with three months of training is considered to be an expert judge in impairment. Officers caught lying about the basis for an arrest should be imprisoned. Enforce the law, but do it in both directions.