A person chooses to pay or not to pay income tax as a matter of prudential judgment about the likely outcome. One does more good for society by being informed and by being good to others in everyday life, than by all of one’s tax payments from birth till death. A “moral obligation” to pay is imaginary.
“absolutely required to pay” and “moral obligation” are not the same thing, nor would they be the same thing if somehow the requirement didn’t come with an explicit “or else” aspect to it.
There was a time when so-called “progressives” made a show of being upset about police powers in the hands of government but by now it should be obvious that the only things really sacred to them to not be policed is whatever contributes the ability to screw whoever you want, whenever you want and eventually wherever you want and to likewise abort the consequences so you can keep on getting it. That, along with possibly getting high for too many, is about the only thing government shouldn’t regulate ... but with the current crop of so-called “progressives” everything else must be regulated or else they think it’ll be madness and the end of civil society.
Or, put another way, at the beginning of our Republic anything that wasn’t expressly forbidden was generally considered lawful for the people (thereby helping explain why the 10th Amendment reserves powers not delegated to the people as well as the States) BUT NOW everything (granted: not sex related) not expressly permitted is either illegal or tightly regulated and the ONLY powers reserved to the people are those the government hasn’t (regulatory) captured from them quite yet.