I'm not the one claiming it is. I've stated that morality and taxes have no connection. Others in this thread, including you, are claiming that paying less taxes = immoral.
>> Corporations which incorporate in a state like South Dakota or Delaware
A grand total of 3 of the Fortune 500 are incorporated in SD or DE. 110 are in NY or CA. It would appear that by your reasoning, the number of immoral companies who "take advantage of incorporation policies" are overwhelmingly outnumbered by companies with such high morals, they selected the highest tax states.
https://www.statista.com/statistics/303696/us-fortune-500-co...