This ignores that whenever the margins for an industry increase, this interests new investments in it, and new players to come aboard, as well as new product li

This ignores that whenever the margins for an industry increase, this interests new investments in it, and new players to come aboard, as well as new product lines that can satisfy the demand in a new way that people either didn't consider or rejected before due to being outclassed by the formerly cheaper alternative. Rationing does not stimulate investment this way.