Permanent Driver Hires

I’m in Michigan. The center I am at had a minimum permanent delivery driver number of 93 per the union reps. Recently two drivers retired and those spots haven’t been replaced. When the reps inquired about it, the business rep advised the number of driver threshold per center was removed in the new contract.

Is this accurate? Are no centers hiring permanent drivers? Or basically UPS will pay the drivers more in the new contract only to work them harder and burn them out.

Thanks in advance for any info.