> Have you been to the post office or the DMV?
Yes, I have. The post office seems to do an EXCELLENT job of delivering mail at an absurdly low price (for standard letters or postcards), although when I lived in Chicago for a few years I found that a certain portion of letters were never delivered.
A number of years ago the DMV (I was in New York and New Jersey at the time) offered terrible customer service; these days the DMV I have gone to (New Jersey and Pennsylvania) seem to do an excellent job.
What I can conclude from this is that quality varies, whether in private industry or public services.