If too many men shun marriage, the government will raise taxes on men in order to keep the female voter base satisfied. 

How can men going their own way protect themselves?

Sandman: Handsome Man Tax
https://www.youtube.com/watch?v=c_AgKuxgmXA

Sandman: Future of Relationships?
https://www.youtube.com/watch?v=OLd9wIo2Mzw

ACLU: Transgender People and the Law
https://www.aclu.org/lgbt-rights/know-your-rights-transgender-people-and-law