Paying more than you are legally obliged to could be considered donating though. I'm not commenting on the specific cases linked to but as I'm sure you're aware

Paying more than you are legally obliged to could be considered donating though. I'm not commenting on the specific cases linked to but as I'm sure you're aware there is a massive grey area around tax law. You can't simply claim that not paying is stealing any more than the parent can claim not paying is ok (it didn't). The details are all about the amounts, which methods are legal and which methods are of untested legality. I think parent's claim is that money is both more willingly and better spent elsewhere (perhaps regardless of legality). Significant numbers of rich people/corporations use methods that are legal to reduce their taxes. Most people consider this wrong despite its legality (probably they also mistakenly believe it to be illegal - because journalism). There's certainly an argument that this is - in part - a of problem for the creator of a complex tax system, who should respond by reducing complexity (increasing enforcement tends not to go well - complexity also hinders that). It also seems likely that the people who consider it morally wrong would do likewise if their tax bill were 100x larger (in Switzerland, it is not a criminal offence to make an incorrect tax declaration. Many non-rich Swiss compete with the tax office to lower their bill). It also seems that you are saying laws are by definition correct. Many laws are not uniformly enforced and many laws are changed as a result of disobedience. Perhaps such people are indeed paying proportionally way too little now but perhaps their actions also affect positive change in future (more efficient system overall, but resource allocation, fewer unintended loopholes). This may not even be their intention, but it doesn't matter.