I think they were talking about progressive taxation anywhere, however just to compete the point: In the US, sales tax is a bit like VAT in the EU. As with VA

I think they were talking about progressive taxation anywhere, however just to compete the point: In the US, sales tax is a bit like VAT in the EU. As with VAT, there's a registration threshold, and if you reach it you may need to lower your prices to end customers. The sales tax registration threshold rules are called "nexus", and are a lot more complicated than VAT!