Guilds/Thieves dens/ and dungeons should only offer 10 jobs to the peasant population. Assuming you would want your wizards training wizards, the peasants would just be there to scrub the toilets and stoke the fires. Similar, Thieves dens would mainly be the high ranking thieves working offering strat on how to be more effective, so peasants just do the grunt work... and dungeons! you want peasants watching trained soldiers captured from war!? I think not, military to go gaurd those scum, arrgh!

This may get shot down cause how someone thinks it effects mechanics. But it helps everyone's BE and is really only logical.