Three small supporting arguments:

1. If we rid the world of crime, we will invent new crimes. Take away the hard crimes, and the justice system will seek to justify its own existance by cracking down hard on jaywalkers of our society, or will be overrun by special interests (religious nuts, anti-religious nuts, etc.) who will create laws to fit their own world view and shut out all others.

2. With 100% enforcement, society will never have an opportunity to re-think what it considers a crime. Where would gays be in this country if 100% enforcement of bedroom activities was possible 40 years ago?

3. 100% enforcement leads to real-world inefficiency. I evacuated for Hurricane Rita from my home in Beaumont. I know dozens of people who lived in New Orleans. Our evacuation problems were caused 100% by nanny-government officials not just letting people get the hell out of dodge. This is an extreme example, but it shows that no set of laws can cover every edge case.