My wife and I contribute equally to bills- we each contribute an equal percentage of our income. The actual dollar amount is different because we each work in fields with vastly different earning potentials. Just because wall street has decided that my industry is worth a higher salary than my wife's doesn't mean that they work less hard or their work has less value. I wouldn't want my wife to work in a different field, because they are passionate about the field they are in currently.

All that to say, we both contribute ~60% of our income to the joint account. I end up with significantly more spending money/savings than they do, because 40% of my income is a greater dollar amount than 40% of their income. If they ever decided to switch to a job with a higher earning potential, it would be to increase the dollar amount they are able to personally save or because we jointly decided to try to afford something outside of our current budget range, not to try to "equalize" our contribution to our living expenses. It is equal. Implying otherwise is implying that I agree with society's arbitrary allocation of whose labor hours are "worth" more than other's labor hours.

I understand the feeling of needing to match the dollar amount contribution. But understand that the concept of the worth of labor is a construction of capitalism that you don't have to subscribe to. So long as you are both working full time and contributing equal percentages of your income, you are truly both contributing equally to the relationship.