You're right that it will take a lot of education, but the point is that at $1000-$2000 range it is financially viable to add these to each village. If the average wage is $1 a day and a village has 100 people living in it, you just need to prevent 10 sick days per person (and I'm not even counting the people dying there) for the investment to pay-off. Apply some microlending to it and that's it.