For example we could phase out all marketing and advertising. We could simplify and automate accounting and many other jobs. We could reduce the work week to 30 hours. We could make jobs teenage friendly and replace high schools with entry level jobs so that people get to try to be in multiple fields before they commit to years of studying anything. We could eliminate most university programs and again replace them with entry level jobs, 20 hours/week - people can study new material on their own free time and at their own pace - eliminate all memorization based learning to pass arbitrary tests and have people progress based on performance on the job. Make moving down on a career ladder or switching careers entirely a common and non-humiliating occurrence, etc.
The most pertinent question to ask is - why haven't any of these already happened? What kinds of people prevent these changes from occurring and what should be done about it? Do you know any of these people - are some of them your family members. Are you one of them? Why does no one seem to ask these questions and seek answers? :)