Likely not. Reduced congestion decreases transit time which can easily pay for the conjestion charge.

The people who are hiring tradesmen are disproportionately the rich.

I mean it's funny to say but I think it should be pretty obvious to anybody that tradesmen are not the only people driving into NYC.

But yeah, customers pay the congestion tax for the tradesmen to drive just like they pay the tariff taxes on the supplies the tradesmen use.