[jimnotgym]

But then the argument becomes rather different. It is no longer a question of "If that's the law then it is not Amazon's fault". It has moved on to "Can we get away with coercing the government into allowing us to break the law".

That is morally a lot more challenging, and there is nothing in the managements fiduciary responsibilities that compels them to break laws. Nothing. Indeed the responsibility to shareholders is more complex anyway, aggressive tax planning may for instance damage your brand and reduce the future profitability.