PS the sugya in gerneal is more complicated, of course – there are several places of discussion in Gemora arguing whether competition is sufficient or prices should be supervised.
Makovi, Michael (2016) New Wine in Old Flasks: the Just Price and Price-Controls in Jewish Law addresses this and quotes Menachem Elon that quotes Yoma 9 as an example of accepted price supervision. I am a little surprised, as it seems to me that Gemora says that yes the practice is accepted by corrupt government (same one that appoints new Cohen Gadol annually), but Rabbis are trying to minimize impact.
He also quotes: Bava Metzia 4:12,5:7, Bava Basra 89a, 91a, Yer BB 15a, SA HM 231:20,23
Makovi also addresses whether Judaism is for capitalism or for socialism, as was recently debated here.