There are clearly laws supporting this system that need to be enforced.
Yep, and we can start by arresting criminals who attempt to buy guns. This is one thing I agree with Bloomberg on.
The problem with NICS is that we convinced ourselves of the need for it. Is there a drop in violent crime that can be associated with it? Nope. Folks just thought it was a good idea, just like some folks think banning 30-round magazines is a good idea.
The Republic survived just fine for 219 years without a background-check system for firearms purchases.