On a side note global sales tax sounds more honest than value added tax. The tax does not add real value to an item,
That is not what it means.
VAT means a tax on the value an entity adds to goods. E.g. if you pay $10 for some parts, pay someone $2 to assemble them into some novel thing, and sell it for $20 then you have added $8 of value and you'll be taxed on $8.
That may have been the initial idea behind it and sounds better than how it seems to be used. Because when I look at a bill from something I buy, I see the price without tax and the percentage of tax, which varies from 0 to 20%, at least over here in France, and the total I have to pay. In NL the max is 21% for as far as I'm up to date.
Some foods are taxed at lower rates, and I recently found that for anything concerning renewable energy is taxed at 5.5%
When I ran my own business I had an hourly rate and on top of that I charged at that time 20% of VAT (BTW in NL), which at the end of a quarter I had to fork over to the state. On the other hand any VAT I paid on goods or service for the business I could subtract from the amount I had to fork over, or even receive back if it was more than what I collected.
Has been subject for fraud, and probably still is, with the moving around of money in some way.
We live in a world where total tax has never been as high as it is now. And it still ain't enough for their needs.