At best this is a misunderstanding of the situation with insulin. Insulin is cheap. Like $25/vial cheap without insurance or even a prescription at Walmart. However, as any diabetic (or anyone who has a loved one who is diabetic) will tell you, cheap insulin sucks.
And so capitalist pharmaceutical companies came in, invested in R&D, and created new formulations of insulin that work better. And they're charging more to recover their investment. And when it goes off patent (and if the ass-covering shitheads at the FDA don't fuck it up), those new formulations will eventually be the same $25 at Walmart.