Reading the responses, it seems we may be talking about different things. I'm imagining someone saying that instead of $50 an hour, you will make $60. Do you work more hours? And my answer (as a college student, especially) would be absolutely yes unless I was entirely miserable at that job.
It seems like others are imagining someone saying that your salary is going from $50k year to $60k per year, do you put in more hours at the office, to justify the higher salary, earn your keep, whatever? My answer there would be a hard no.
Good differentiation. I think the premise was the pay per hour was going up and you had the option to either work fewer hours (thus keeping the income the same but work lss) or to choose to work more hours (thus increasing both income and working more hours). Most were choosing the latter option, thus making more money and working more. Whether they're choosing to work more because they're making more money (per hour), or because they'd earn more (in total with the increased hours and higher hourly rate) is unclear to me though.
I think it would have been nice to have been presented with three options:
Your equivalent hourly pay rate is increased, do you choose to:
1. Work fewer hours to keep your overall pay the same,
2. Work the same number of hours and earn the higher salary,
or
3. Work more hours, increasing the number of worked hours and reaching the highest total income possible at that rate (with the hours allowed anyway)?
I look at working hours slightly different from many people, as I'm single and have no kids. As such, an 8 hour work-day leaves me with 5-8 hours (depending on how long lunch/commuting/etc take) each day during the week. What I'm actually going to do with most of that time is sit around and play video games, watch TV, etc (as opposed to the "better myself with education, workouts, etc" that I keep telling myself I'll do). So, working more to drop those numbers to 2-5 hours of free time still gives me time to work out etc if I choose to, as well as more than enough time to play video games or rot my brain in front of the TV but pushes my income up, and accordingly raise my savings amounts without having much of a negative impact on my quality of life, since the things I really enjoy doing most (sailing, scuba diving, etc) aren't something I can do during the week where I live anyway. And I still get to go do those on the weekend.
As such, I generally choose to "work more hours". Now, if I was coming home to a wife and kids that I could/would want to spend time with every day, then the negative impact of not having that time (due to working) would likely make me choose to either work the same or fewer hours instead. Thus allowing me to maximize doing the things that were important to me in that scenario (spending time with family, raising kids, etc).
If I was single and the things I enjoyed doing most were available in the evenings during the week (such as when I regularly went out with friends during the week) then maybe my priorities would have chosen option 2 instead.
I think it all comes down to what makes life enjoyable for you, when you can do that, and how you want to balance those things with earning money to pay for your goals (whether enjoyment now or retirement later).