I’m bored by people throwing the word “moral” into stories about taxation. Not because I don’t find morality or taxation interesting, but because people get no further than asserting that something is immoral or moral. And that’s it.
There is a lot more to be discussed beyond dismissive relativist arguments such as “morality is just a matter of opinion”.
So, if anybody is interested in a bit of self-education and actually furthering the “morality” debate regarding taxation, here is a fantastic resource: edx – free courses from MIT, Harvard University, Berkeley , etc…
There is a course (now finished but materials are still available) on Justice which covers, I believe, much of the key moral theory which may be applicable to taxation.