You just described Fair-trade laws[0] enacted during Great Depression and repealed around ~1971. Matt Stoller also described these laws in his book. [0] https:

You just described Fair-trade laws[0] enacted during Great Depression and repealed around ~1971. Matt Stoller also described these laws in his book. [0] https://www.britannica.com/topic/fair-trade-law https://www.britannica.com/topic/fair-trade-law