This is one thing that is cheap in Eretz Yisroel. Babysitters range from 15-20 shekel an hour. (About $4-$6). Since the teenagers finish school at 1:00 they are bored. Their parents WANT them to babysit to make money and to do something constructive with their afternoon/ evening.
If you go to Shefa in teh afternoon it is loaded with babysitters!