Washroom Weirdness

I was in a washroom the other day and noticed that there were eight wash basins but only one warm air hand dryer, one of the old slow type.  Now it seems obvious to me that, since it takes far longer to dry your hands with one of those than it does to wash them (even when you follow all six steps of the Hong Kong government's helpful instructions - if my grandmother was still alive, they'd probably have a poster teaching her to suck eggs), the number of dryers should be greater than the number of wash basins.  Since all public washrooms seem to be set up that way, I just wonder why the people who design these places have never noticed this.