Schooling still has a minimum price that needs to be charged to be sustainable. Teachers are not cheap, among other costs. Drugs do not. Drugs are very cheap to produce after the R&D. Financial aid (price discrimination) would work rather well for drugs (but we'd all end up paying more, generally, just like higher education).

As for whether he has implemented financial aid yet, I do not know. Bear in mind that only tens of people buy this drug a year, so implementing financial aid is almost as easy as just having an email account for requests.