Supply and demand. If kids are willing to work for 5 bucks an hour, why pay more? Especially when the vast amount of promo asst's are there as cheap labor- they need someone besides the jock doing the remote or making the appearence to set up a table, hang some banners, plant some yard signs, etc. You KNOW the jock ain't doing that himself, but it certianly doesn't take 24K a year and a college degree in RTF to do that either...
And every station I've worked at in this market, and there have been plenty, have looked to the promo 'kids' that took their job seriously when they've needed full time promo assistants, board ops, dub monkeys, etc. The nhew blood has to come from somewhere, why not use the promo crew as a test area? If they're lazy, don't bother to learn about the station they're working for etc, they automatically DQ thrmselves from further consideration. But I know some people who passed thru promo departments on their way up...it happens...