I can also state that the majority of my medical expenses go to insulin pump supplies, not insulin itself. On average, I'm paying roughly $250/mo out of pocket, after 90% insurance coverage for the whole diabetic kit-and-kaboodle. I would be quite troubled if I were to lose my job and/or medical insurance. Thinking about the future, it's definitely a fear of being in a circumstance where I will be without supplies for any amount of time.
As another commenter noted, and got down-voted instantly, a large cause of the insulin usage increase (and therefore pump increases) is due to a dramatic increase in the diagnosis of type 2 diabetics.
Depending on where you're treated, many type-1 diabetics are given a rather thorough crash course on the disease (and it's symptom-based-cousin, type-2, for comparison). In my opinion at least, I don't feel like many type-2 diabetics are given as much information, or are potentially more reluctant to absorb it.
It's a broad generalization, but not necessarily inaccurate, to state that most type-2 patients rely on medicines to treat their symptoms and will not adjust their diets even under the worst case scenario. Type-2 in many ways can have it's symptoms reduced/resolved by something akin to a keto diet. That said, sugar is ridiculously hard to quit.