Youre conflating 'working more hours' with 'doing more work' - these are not at all one and the same.
A fresh college graduate could spend 60 hours trying to spin up a new web server, where an experienced professional could do the same in an hour. Should the fresh graduate get a promotion for this?
You're right that higher paying jobs require more of you, thats why the barrier to entry is higher. You need to have more experience and know how to do more things. You're not getting paid more because you're expected to work more hours, but because you are expected to be capable of doing more complex work.
A fresh college graduate could spend 60 hours trying to spin up a new web server, where an experienced professional could do the same in an hour. Should the fresh graduate get a promotion for this?
You're right that higher paying jobs require more of you, thats why the barrier to entry is higher. You need to have more experience and know how to do more things. You're not getting paid more because you're expected to work more hours, but because you are expected to be capable of doing more complex work.