- total tax the corporate pays globally; and
- share of the cake paid 'locally' vs in the home jurisdiction
This measure seems to me to be more about the second of those than the first, but politically thats a hard sell so you see all the statistics about how much tax they paid 'in the UK' etc etc. Most people misread that.
Politically of course agreeing on a fair share of the cake is much harder than saying 'we should tax them more globally'.
It’s not really different for tech companies or global companies.
Maybe a couple of examples: if I buy clothes from Amazon's own brand/white label, which are manufactured in another country, what is the appropriate amount of profit that Amazon UK should be allocated and taxed on for my purchase? Now what if Amazon sold that operation to someone else? Should they then be allowed to deduct it? If you get that wrong, then you create a tax incentive to either insource or outsource functions (since for the same cost structure, one will save tax over the other), which is an undesirable outcome.
Or let's say I'm a UK Amazon Prime subscriber. I use some of that for video content, some for other services like postage. Some of that video content was created by their own studio in the US or Canada and is only available on their platform; some was licensed from a third party. How much of my prime annual fee should be allocated to the Amazon UK operation? How much to the internal Amazon studio? What about other bits of Amazon which are involved? Again, how do you ensure that that doesn't created a non-level playing field vs third-party studios? Third-party hosting services or CDNs? Third-party payment processors? Etc
Then consider that until last year, Amazon in the US would have also been taxed on the whole empire's worldwide profits but been able to deduct taxes already paid under various double tax treaties. So if the UK taxed amazon more, the US would have received correspondingly less. This is still partly true.
None of this involves anything which is tax motivated - it's all business motivated. Layer in tax incentives various government put in place for other policy reasons and it becomes even more complicated.
"Fair" is very hard when you get to the level of complexity involved in these types of businesses.
Amazon collects a very large amount of VAT, no? It's the customers who are paying, not Amazon.
Economists would say that who should be viewed as "paying" any indirect tax (the tax incidence) depends on the price elasticity of demand for the goods/services in question. For highly inelastic goods/services, buyers should be viewed as paying the tax.
For highly price elastic goods, sellers (who amount to the employees and ultimate individual shareholders of Amazon) should be viewed as paying.
In the middle, it's a mixture.
The "solution" the UK has proposed is another indirect tax, so whatever applies to VAT applies to that as well.
Hell, customers' are the ones paying Jeff Bezos' capital gains tax by that reasoning.
Customers might figure in that in an even smaller way but its probably very minor.