Oh, of course not, LOL!
You seem to think HR cares about managers. HR doesn't give a flip about managers or couriers or anyone else. Their only concern is seeing that policies are properly followed; sometimes because they believe that such consistency is essential to a thriving workplace, sometimes because they think they are the only ones who really understand the letter and spirit of our policies and want to show off.
Either way, they don't care about either side when it comes to the awarding of additional hours or scheduling swings on Saturdays. You're such a horribly uninformed and ignorant dope.