It's not the money. Dedicate the computational power to @Folding and it would be worthwhile even if they also paid people. Personally if I had to choose between generating data for medical research or hash functions for proof of work, I'd go for the medical research. Though I'm not sure we really have to choose-- aren't there coins in the works that are trying to address the massive power consumption issue?
There are many research projects that could use some more computing power and that would bring a gain to humanity.