RE: Dcity: finally understanding how the market works...

That's the quickest way. There's a slow way. To put your problematic cards on the market at too high prices to sell them (if you don't want to sell them). They won't drain from your workforce, nor give you any benefits, but you can wait with them on the market until the population grows naturally. As it grows, you take cards out of the market and re-activate them.