At IV the inventors get a profit share in patents they invent. Actually, in most universities that is true too. Typical university policy is that of the royalties the university gets, about 1/3 goes to the professor or grad students. In start ups the inventors typically have stock or options and thus have a stake in the company getting revenues. Independent inventors own their patents outright. I think that the more we can show that invention make money for the corporate or institutional owners the more pressure there will be share with the inventor. That is what happened with stock options - it becomes a competitive thing to get the best people.