It's funny, because I lean liberal and I don't. I think there will be plenty of jobs for a long time. I don't want to put words in your mouth, but is it possible what you're saying reflects some sort of bias you have about the inherent value of people who are less _____ than you? Can you say a little bit about what these supposedly useless/unmarketable people are like, what they have spent their time doing and why their skills have no value?
My hypothesis is different than yours: The pendulum in the employer class has swung towards authoritarian control over the last 50 years. Employers have tried to organize both their business and society so that employees either have fewer choices, or believe they have fewer choices.
Employers have organized things such that people are afraid to leave their jobs, through norms like employer-provided health insurance. They have pushed important work like customer service into an "hourly" category, which is considered unskilled, where wages can remain stagnant.
These norms benefit all employers, and can't easily be "shorted" by a single organization paying their employees their true value. To extract the true value from those workers you'd need to have a continually expanding management apparatus to provide space for those employees to grow into, and you run into scaling issues. Therefore the mispriced labor can only be "shorted" by a federated system of many businesses making the play together.
But the pendulum is swinging back. People are waking up to the idea that if they can contract themselves out to multiple clients, they can have leverage to extract their actual market rate from employers.
And software will eventually provide the market for the federated play I describe.