True, the US sales tax thing is a great case-study on how it doesn't work. Taxing revenue probably also doesn't work due to large differences in margin. If you

True, the US sales tax thing is a great case-study on how it doesn't work. Taxing revenue probably also doesn't work due to large differences in margin. If you tax 1% on the revenue of a 1.5% margin kind of business it sounds rather unfair, charging a 1% revenue tax on a business with 90% margin sounds low. So indeed there is no clear simple implementation strategy for this yet.