Rather than placing price controls on private companies the US slashes taxes to the point where public services then cannot invest in infrastructure and maintenance - and then use that as an argument why public services should be privatized.
If tax cuts aren't populist policies I don't know what are. The magic trick of the right wing parties has been to sell tax cuts as a great thing to the very people who don't benefit from the cuts and are hurt by the fiscal fall-out. That and attaching themselves to Christianity while not following any of Jesus's teachings.
When a service is a monopoly there is no good reason for turning it into a for profit company outside of feathering the pockets of the rich. If the electricity supply to my house (and by extension my street and my city) is controlled by one company and they own the cabling and infrastructure then what is the motivation for them to not jack up my prices to generate profits to their shareholders, as they should as a shareholder owned company? What is their motivation for encouraging renewables or improving infrastructure when those would reduce profits and reduce shareholder value?
Mamdani hasn't even been voted in yet. Keep sowing that fear so that the people his policies might benefit don't actually vote for him - because he's a scary socialist (in the loosest, most American, definition).