Link exchange
Suggestion: Every production company will get an url which they can use to generate workers from outside the game (no reCaptcha required for this).
Max usage: The link will only work up to 5 times a day per company.
Costs: It'll cost the CEO 10% energy on click, the link will only work when the company has assigned a CEO.
This might both help solve the problem of the little amount of available workers, and increase demand in food.