I’m sure the real reason they oppose it is that school districts are the largest employers in many rural areas. It’s like welfare for middle-class white women.
I do confess that I rather like these tiny post offices the 5 or 6 times a year that I want to mail a package. The alternative is to go into one of the big towns, jockey for one of the limited meter spaces and guess how long you are going to be standing in line before the meter maid swoops in to write you a ticket. Generally, it is just best to overfeed the meter pig.