So all countries individual tax laws interacting with each other is completely "bug free"? Seems very unlikely. Maybe if there was a single global law for taxat

So all countries individual tax laws interacting with each other is completely "bug free"? Seems very unlikely. Maybe if there was a single global law for taxation, but even then it would have to be perfectly designed. A much more likely scenario is that not all outcomes can be accounted for, and for those willing to pick through the laws there is money to be made by finding the loophole. When one is found the politics of changing the law to fix it come into play of course.