I'm work from home in my underpants doing administration/development for a specific software package for large companies. It's often a lot cheaper for companies to high me part time to maintain their system (monitoring, upgrades, bulk updates) and some project based development stuff then it is to higher sometime full time with benefits and what not.
However, I definitely don't feel like I'm contributing to society in anyway. Just padding my bank account so my kids can buy toys. Eventually I'll snap, sell all my stuff and go live in a yurt in the forest.