Most suppliers cannot simply produce 2Y the goods at the same price. Switching lines involves retooling and, risk, and/or overtime, all of which are expensive.

Most suppliers cannot simply produce 2Y the goods at the same price. Switching lines involves retooling and, risk, and/or overtime, all of which are expensive. If that switch can be done for under the price cap, then the price should remain under the price cap anyway due to competition. If it cannot, then shortages will result.