Google is already trying to increase the share of paid apps in Android market place as it still does not come close to Apple's app store. If they don't concentrate on quality developers, they will find it even more difficult to do so.
One thing I've noticed is that paid apps are ranking higher than free apps in searches. That's all great, but sometimes the paid apps are really the crappiest. They really need to find a balance between paid apps, quality and the free apps. It looks bad on the Android Market when someone searches for something and what they get are crappy/ugly apps (which there's quite a lot of on the Android Market).
