This varies wildly by medication; and makes a ton of assumptions that all happen to benefit the drug company's position/parrots their PR.

For example, my partner needs $100/pill medication, which also had a "savings card." That card only lasts for 12-months or 8-pills (whichever comes first). Then it is $100/pill. After insurance (High Deductible), we pay out of pocket $100/pill up until $3200. Insurance discount: 0%.

So the cash price and the insurance price are identical, except the insurance price counts towards deductible. UK price of the same medication? £10/pill, and that isn't via the NHS, that is full-price private (NHS could be as low as FREE, depending on several factors).