If they decide we need to do weekend deliveries (which...this is 2018, so maybe we need to concede that point), then the weekend guys need to be FULL UPS employees with the SAME benefits, who work five consecutive days just like the rest of us. That way UPS will get its weekend deliveries, and these weekend employees won't unnecessarily eat into the weekday deliveries.
Hell, some of our senior guys might even sign up for a weekend schedule, for family reasons, or just to get stuff done on weekdays.
I think that's equitable. Why would they be paid lesser wages? That doesn't make sense. It'll breed contempt just like it did at Ford, et al.