exactly, it doesn't matter whether your sector is to fly for 10 minutes or 10 hours, you will still get paid the same amount per sector flown.
however, some companies also pay duty pay, which is an hourly amount for being on duty. this would then reflect in someone flying a longer sector having a longer duty day and ergo, getting more folding in their sky rocket.
so in calculating your take home pay, don't consider just the basic wage (as listed on ppjn). short haul operators tend to do 4-6 sectors a day (big sector pay packets) and long haul only 1 sector but 10-12 hour duty days (big duty pay packets).
of course, once you take into account expenses, standby periods and working days off as well, crew payroll becomes a higher form of mathematics and generally needs some white haired tefal type boffin in a slightly grubby lab coat to really understand the nuances.