I earn considerably more than Max, despite him having two degrees. He doesn't work in either field and he's in a ward situation in a public hospital. I am a PA to a private specialist (orthopaedics, too) and I earn about $12,000 per year more than him. Soon he'll be working part time while he studies, too, so I'll be contributing a lot more to our finances.
It doesn't matter though. He's studying again so he can increase his income, and I'm studying, too, so I can increase mine. We're also studying because we are capable of a lot more than we're doing, and we want to better ourselves. Neither of us care who earns what, as long as we don't fight over money and we can eat and have the odd nice thing and provide for our furchildren! We'd BOTH like to earn more - but neither of us care who earns the most!