You're assuming less hours = less pay, which is unwarranted.
Someone who is at work for 40 hours is not necessarily "working more" than someone who is at work for 30 hours, it just means they are less efficient. If both workers produce the same output, they should be paid the same.
In many cases, it's easy to make a 40 hour job into a 5 hour job with proper planning and automation. But since workers are required to be at the office for 40 hours a week anyway, the work "expands" to fill the time with useless meetings and time-consuming manual processes.
Someone who is at work for 40 hours is not necessarily "working more" than someone who is at work for 30 hours, it just means they are less efficient. If both workers produce the same output, they should be paid the same.
In many cases, it's easy to make a 40 hour job into a 5 hour job with proper planning and automation. But since workers are required to be at the office for 40 hours a week anyway, the work "expands" to fill the time with useless meetings and time-consuming manual processes.