you're probably right. but it's probably also for poor people who can't afford the medication. or even people on health plans. because like i said, anyone who was able to get it before still is able to get it now.
i dont think that's how it works. if you need the drug you will find some way to pay for it; this can involve serious impacts on quality of life as people start cutting back on anything not absolutely 100% necessary. there is no reason for people to have to suffer cutbacks to their lifestyle simply because someone else has a monopoly on something essential to them and wants to be richer.
if food prices went up 500% i guarantee you people would still be buying food. and those who cant afford it wont need it after they're dead, so your situation would still be technically correct but missing context.
edit: massive inexplicable medicine price markups have been a longstanding issue - shkreli isnt the only one to have done it, but one of the few who did it so much so fast. there is no reason for the costs to produce medicine go up 20-100% or more a year for more than a few years straight, let alone go up at all (other than to counter inflation, which is practically negligible on a year to year basis)