As a moped owner you should be more aware than any one of the dangers of driving drunk. I ride in a very populated urban area (downtown denver) with a large number of bars, and my worst fear is some drunk asshole plowing over me while I'm on my moped. I also know better than to ride my moped drunk. While riding you had better be very aware of what's going on around you. A car has a good 2000lbs. on you.
Of course you deserve a punishment, and a large punishment, for doing what you did. And DUI punishments and fees are NOT to make money for the state. They are to keep morons off the road. It takes a stiff punishment to get it through to anyone who is dumb enough to drive drunk.