The trouble with supply and demand is that people can't exactly stop eating for a few months if they can't find work that pays as much as they'd like, so as long as there are more people who need jobs to eat than there are jobs it can't do much to stop the downward pressure on wages - which in turn means that it's in business owners' interests to make sure this is true. (Why do you think there's really so much pressure to cut welfare in countries like the US?) If anything, decreasing prices could increase supply as people are forced to work multiple jobs in order to afford food and shelter.