Puhleese, if you're going to make a statement like that you need to at least attempt some sort of citation.
The vast majority (in the US at least) of price discrimination instances are cases where anyone is free to choose the cheaper option. Rich people can clip coupons too, they just decide it's not worth it for them. Heck, the whole reason for a Tesla Model 3 and Model S is price discrimination. I think it's a great thing I'll be able to get a Model 3 while richer consumers can choose a Model S if they care to.
It is common economic knowledge/theory. My citation is any economic textbook on price discrimination.
Let me give you an extreme example.
Imagine that a company perfectly knew the exact maximum amount of dollars that you personally are willing to pay for their product. Then, they offer you that product for 1$ less than your maximum.
This is called perfect 1st degree price discrimination, and results in ~zero consumer welfare, because consumer welfare is the difference between actual price paid, and max willingness to pay price, which in this case are both ~equal to one another.
The vast majority (in the US at least) of price discrimination instances are cases where anyone is free to choose the cheaper option. Rich people can clip coupons too, they just decide it's not worth it for them. Heck, the whole reason for a Tesla Model 3 and Model S is price discrimination. I think it's a great thing I'll be able to get a Model 3 while richer consumers can choose a Model S if they care to.