VAT taxes (or sales tax in the US) will tend to more heavily effect lower income workers, which will not be the majority of people on HN. VAT taxes are heavily regressive and, outside of the luxury class of such would be nice to see phased out.
Most sales taxes in the US aren’t applied to staple good like food, blunting the impact on lower income workers.
I would disagree it doesn’t impact higher income works because you’re still paying sales tax on luxury items and because of the high prices, the tax is very high.
In Canada it’s not uncommon for the HST to be 15%.