It makes the air in poor and working class neighborhoods dirtier by forcing extra traffic from drivers priced out of the congestion zone onto their roadways.

The additional pollution increases cancer and asthma rates reducing both the sheer number of the poor and their carbon footprint. You can't abet global warming if you're dead, after all.

The wealthy replace the deceased workers with AI robots that they don't have to pay and also get to live in a world with fewer poors. Problem solved, win-win.