How do you handle large income gaps (couples) ?

Xoxocutekitty
My partner makes about 5.5 times, my salary (pre-tax).
He pays about my salary in taxes, another one of my salary in an insurance policy, and he gets paid in stock another portion. His cash net earnings, are only about 2.5 my salary.

How do you split finances with your SO? How would you navigate such a large wage gap? I have always aspired to maybe one day get a small house in the suburbs to support my mother who cannot retire without financial assistance in say 7-10 years. He wants to save for an expensive house n the city. How do we combine these goals without creating an unequal power shift? Morally, a couple needs a house to live in, and morally, I cannot leave my mother unprepared in her retirement.

We are young, and are currently cohabitation (first 3 months) in a shared apartment where we have not have to face financial challenges due to staying in and quarantine. Naively, we always thought that money "doesn't matter", but I cannot help for already feeling resentful or "trapped" because his opportunity makes my dreams in comparison seem "small" or "insignificant." Thoughts and suggestions?
How do you handle large income gaps (couples) ?
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