Collections based contract - possible slavery?

If one signs a collection based contract, could the employer theoretically have the signee work for free by not scheduling you any procedures that will collect? For example - come work 9 hours today and take xrays which you dont get credit for - what is stopping them from doing that every day for the length of the contract
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Dental Residents and Practicing Dentists Source Type: forums