He raised the price in order to have more money to develop a drug that better combats toxoplasmosis, the current drug for it is the drug he raised the price of. It literally kills all types of cells indiscriminately, not just the parasite. He wants to develop a drug that targets the parasite itself. He takes a $1 salary from the drug company and of course he has a stock position, but thats because he paid for and bought the company. So while it is a bit more painful for now, it is eventually going to help more people.