I don't know about "magically" but it would seem rational that people who discover the narrow choices and costs of Covered Cal will work harder to get a job and let the employer take care of the insurance issue.
Explain why someone who is NOT working and therefore would qualify for Medicaid would go out and get a job just to have employer paid insurance?
These people already had paid insurance. Medicaid.
why would you think people without jobs would have to pay for insurance?