Sure, a monopoly can reduce prices - but as soon as it eliminates its competitors and captures its government, it's going to raise those prices, safe in the knowledge that a company that's too big to fail is too big to jail:
pluralistic.net/2024/08/14/t...
pluralistic.net
Pluralistic: The one weird monopoly trick that gave us Walmart and Amazon and killed Main Street (14 Aug 2024) – Pluralistic: Daily links from Cory Doctorow