You would have to change a lot, but there is a natural basis to judge on: there’s already the tax-law definition of ‘household’, and you could allow any or all of a household to file as a unit. It would also be very feasible to make a simple formula for the tax rate given the number of wage-earners in the household. The only trick would be dealing appropriately with teenager’s first jobs.
Honestly, I think those would get easier rather than harder. If you no longer have a set limit on ‘roles’ in the marriage, you don’t have cultural intuitions about correct outcomes, and designing a system that is simple and easy to execute gets easier.
You would have to change a lot, but there is a natural basis to judge on: there’s already the tax-law definition of ‘household’, and you could allow any or all of a household to file as a unit. It would also be very feasible to make a simple formula for the tax rate given the number of wage-earners in the household. The only trick would be dealing appropriately with teenager’s first jobs.
On the contrary, I think divorce and child custody would be the thorniest issue (as it is in binary marriage divorce).
Honestly, I think those would get easier rather than harder. If you no longer have a set limit on ‘roles’ in the marriage, you don’t have cultural intuitions about correct outcomes, and designing a system that is simple and easy to execute gets easier.
I don’t know enough about U.S. laws. But from my understanding here in Germany it would be quite complicated...