Arguments for... somebody wanting to get paid for their work? What are you doing?
Best read: You are confusing different products. Somebody can do two things and get paid for only one of them.
Worst read: You are really trying to confuse them.
Either you support an economy where everyone gets a meager living wage just for existing and then once that's established you can complain about people trying to make money off open source, or you say "capitalism as it exists is great" and swallow the fact that people who you don't pay don't work for you. Which is it?
/s