people enjoy doing high-status things and will trade off pay for status. asking for equal pay as low-status work is essentially asking to have your cake and eat it too
I'd love to live in a world where working for a non-profit was high status. Unfortunately that's just not the world we live in. Maybe if you are someone high up at a well known charity, but the bulk of the people keeping non-profits running do not get status from their work.
Is working for Wikipedia somehow a higher status job than working for Google?
edit: I'm asking because my 7 year stint as an engineer at Wikipedia hasn't provided me with an endless stream of lucrative job offers.