Above response aside, the short answer is yes. A contract is enforceable, regardless of what you may have heard. What varies from state to state is the tools available to the employer to recover funds owed by the contractor (you).
In Texas, for example, the tools available to a plaintiff to recover after a favorable ruling in a law suit are weak at best. But, the employer can still file reports on your credit, send your case to collections, and give negative responses to PRIA requests. So, you might get away with out paying what you owe (depending on where you live), but you won't be consequence free.