I disagree that earning more and working more are usually related. It can be related, but I don't think it's the norm. I think the norm is working more than you're getting paid for, and that pay not differing from those who are working less than you. Just look at people wringing themselves out in the hospitality and services industries, they're not getting paid more than everyone else.
The important part is earning more leads to paying more taxes. If you work the same job you'll earn more money while working 40hrs than working 20hrs. Where 40hrs is the standard, so in a general sense people working normal hours will pay more taxes than people working reduced hours.
Ah, I think we were just talking past eachother then. That makes sense to me. I was imagining the situations where the same two employees are paid 40hrs/week but one works 40 and one works 60. It sounds like you were thinking of people working part time versus people working full time, in which case definitely, the latter correlates to more income and more taxes.
