I understand completely what you're saying that some volunteer jobs shouldn't be done by volunteers, and I fear that with us boomers, organizations will take advantage of that fact. I remember one place where I volunteered in the office I would see some of the regular office staff standing around doing nothing but getting paid for it while I did the actual work. That used to tick me off too.
I have a background in a lot of areas and think I could help out in many places as I have in the past, but I just don't want to commit to a regular schedule. I am not a church goer, but some of the opportunities that the Unitarians do I would love to do. I often said that if I was going to be religious, I'd be either a Buddhist or a Unitarian
After being retired for most of the year I'm starting to get into a rut which I cannot allow myself to do. I am the type of person who needs to do new things and meet new, like-minded people or I get depressed. I do love being able to get out of bed at whatever time I want to, sit with my coffee for as long as I want to, stay up late reading an engrossing book if I want to, etc. etc. I live alone and my dog just died this past summer, so my circumstances have changed quite a bit this year.