I'm usually one for a good conspiracy, but I think you are off on this one. I'm not saying cops won't take advantage of this for added revenue, of course they will. But, a lot of good laws are taken advantage of by cops. Cops are a necessary evil. I slightly agree that the OP got screwed, but then again this isn't 1950. The roads are packed, everyone is driving 70-80mph on the highway on the road with 20 ton semi's and one small mistake can spell doom for a lot of people.
When I was a kid my dad drove me off a small cliff, luckily no one was hurt. But being a kid I was totally oblivious to what was going on. When the cops came and we got pulled out they asked me if my dad had been drinking. I was shocked that they would ask me, and told them there was no way he had. Turned out he was wasted. He proceeded to tell the cops that we were fine because the crash had been in slow motion, woops. He should have just smoked pot, we would have gotten to the video store extremely slow, but at least the car wouldn't have gone off a cliff.
He could have easily killed someone, and should not have been driving(we didn't realize he was dying rapidly from liver failure at the time and was incapable of making good decisions) but this goes for a lot of people out there. Their brains are messed up from prescription drugs, disease, illegal drugs or mental illness and just a few drinks can completely scramble their brains. This may suck for the rest of us, but we have to keep these people off the road at all costs. Huge DUI consequences are really the only way to make people think twice. Although installing breathalyzers in all cars might be a decent backup step.