Then don't allow it for Leadership. Leadership doesn't seem to be a typical crafting skill in it's current state. All tasks are 1 hour or more and don't really develop crafted goods.
King is right; the progression wall exists for the wokers as well. For Leatherworking, I can hire the basic Skinner (Tier 1). Then with 4 Skinners I can hire a Tanner (Tier 2). Then with 4 Tanners I can hire an Assistant Leatherwoker (Tier 3). But to hire a Master Leatherworker (Tier 5), I need 4 Leatherworkers (Uncommon),…
I had mine going all weekend. http://www.twitch.tv/mythgamestream Mostly played my Trickster Rogue up to level 44. Played the Great Weapon Fighter though as a Halfling for the last couple of hours.