Um. Seriously? This already happens. Some people who work for crypto businesses get paid directly in bitcoin. Just check out the Services sub board here. It's an entire board dedicated to people offering their skills or work in exchange for bitcoin. Even you could do it. Many people even get paid by signature campaigns here and those are people who are getting paid to offer their advertising/promotional services. Not sure how effective they are to the people paying them but they certainly seem to be popular here.