That is oversimplifying. Would it have been wrong to avoid paying taxes to the Nazis, or the Stalinists, or the Maoists, or the Khmer Rouge?
You are implicitly incorporating the morality of supporting an unspecified government into business behavior.
If you believe that, on balance, expenditures by the US government of tax-derived revenues produces more harm in the world than good, you would therefore consider it a moral virtue to legally and lawfully minimize the amount of taxes delivered to the IRS. If you believe that expenditures by the US government of tax-derived revenues do more good than otherwise, then you would consider tax avoidance to be morally wrong. But then you also have to consider whether a corporation has a greater moral obligation to maximize value for its shareholders, or to pursue a specific purpose as stated in its charter. In either case, the corporation should seek to retain as much control over the disposition of its revenues as is possible.
In your "legal murder" hypothetical, I would consider it both moral and ironic to murder the person responsible for creating the legal murder loophole, along with any other person that has ever used it. I might still refrain, as that means I would be losing some of my morality-based protections against being murdered, with the knowledge that my legal protections are already nonexistent in loophole-compliant circumstances.
But I am a natural intelligence with moral agency. A corporation is an artificial intelligence, programmed by bug-ridden legal documents, and its program executed by its lawyers and C-level principals. It isn't a paperclip optimizer, but it is a banknote optimizer. It has no moral values that humans can readily recognize. It isn't a psychopath or sociopath; it's just alien. In order for a corporation to exhibit moral behavior, the morality has to be included in its programming. That's difficult. It is much easier to incorporate by reference the entire body of public law, and then allow the corporation to pursue "any lawful purpose". And tax avoidance, aside from moral considerations, is still "lawful".
You are implicitly incorporating the morality of supporting an unspecified government into business behavior.
If you believe that, on balance, expenditures by the US government of tax-derived revenues produces more harm in the world than good, you would therefore consider it a moral virtue to legally and lawfully minimize the amount of taxes delivered to the IRS. If you believe that expenditures by the US government of tax-derived revenues do more good than otherwise, then you would consider tax avoidance to be morally wrong. But then you also have to consider whether a corporation has a greater moral obligation to maximize value for its shareholders, or to pursue a specific purpose as stated in its charter. In either case, the corporation should seek to retain as much control over the disposition of its revenues as is possible.
In your "legal murder" hypothetical, I would consider it both moral and ironic to murder the person responsible for creating the legal murder loophole, along with any other person that has ever used it. I might still refrain, as that means I would be losing some of my morality-based protections against being murdered, with the knowledge that my legal protections are already nonexistent in loophole-compliant circumstances.
But I am a natural intelligence with moral agency. A corporation is an artificial intelligence, programmed by bug-ridden legal documents, and its program executed by its lawyers and C-level principals. It isn't a paperclip optimizer, but it is a banknote optimizer. It has no moral values that humans can readily recognize. It isn't a psychopath or sociopath; it's just alien. In order for a corporation to exhibit moral behavior, the morality has to be included in its programming. That's difficult. It is much easier to incorporate by reference the entire body of public law, and then allow the corporation to pursue "any lawful purpose". And tax avoidance, aside from moral considerations, is still "lawful".