Integrity,
A company that is turning off the lights in vending machines to cut costs is not going to provide a nanny state for you to work in. This is the real world so get over it. It seems all your concerns about heat, pkg cars, ect. deal with spending other peoples money (UPS). Are you a socialist? It works great until other peoples money runs out. Ever been paid by a company that was broke. You should have been hired to work at a gateway...maybe then you would understand what cold really is!
UPS is just a company and has no particular interest in you as a person.
UPS is willing to spend a certain amount for resources in order to get a task completed.
Lighting, heat, belts, electricity and people are just some of those resources.
UPS has stated it is not going to be that Patriarchal company that United Parcel Service WAS and that it's employees should adjust.
The purpose of a job at UPS is to exchange time and effort for money - it is a transactional relationship, no more, no less.
Do not let yourself fall into the trap of letting a job at UPS define who you are as a person.
UPS is an external influence and you must look within yourself to understand who you are and what defines you as a person.
Once you transcend the false relationship between UPS and yourself, you will be at peace with your external relationships and either accept them or terminate them.
A bad relationship is not good for you - do not walk away but rather, run away.