what a weird way to justify it. the patents on insulin expired decades ago so why does it cost $400 for uninsured? it doesn't cost pharma companies $400 to produce a vial (or $200 or $100). this is pure greed.
edit: say their insurance covers 80% of the cost, the patient still has to pay $80 (at $400). if the cost of a vial was $20, they only pay $4 which is more reasonable.