Holiday pay

Our language requires the company to pay the on call drivers 4 hrs of pay to sit around until noon and call in to make sure they aren't needed. Instead, the company doesn't use that, makes everyone believe they are on call if they aren't scheduled, and tries to pretend that the 4 hour on call pay actually means the lowest two senior drivers are only guaranteed 4 hrs pay. The clause right before it says that all seniority drivers are entitled to a full day's pay if they show up and are put to work. Some of the clearest language in the contract, and people still get confused by it.
I believe it. Nobody pays attention.