A common assertion is that MGTOWs should work for themselves. A common approach is to work at job with modest pay, live together with other fellas to reduce expenses, and not pay taxes because (at least here in the US), poor people do not pay taxes.
Another stated approach is that MGTOWs should make respectable money, but keep it for themselves to be used on enjoyable endeavors. Of course, if he does this, there will undoubtedly will be taxes.
In actuality there are/will be a whole spectrum of MGTOW approaches, some being aware of the term, but most probably will not. It is clear however, that their numbers will grow. What are women/government to do?
Since this group will be detached from both women and government, both would probably view them from a minion perspective. That is, how can useful work and taxes be extracted from them? I am sure that there will be many creative ways.
There are the usual suspects, bachelor taxes (disguised undoubtedly), but let us get creative here. How can government/women get what they want? Think not just in terms of taxes, but in other ways. You have your assignment, now have at it.