Bangalore's Rising School Fee every year

Is it normal for schools in Bangalore to raise the school fee every year by a minimum 10%. How is this allowed by law and how are parents OK with this business? I want to get a wider perspective, is this something common with all schools in bangalore or is just a few schools? The school fees is already high starting from pre primary at around 1.2 lac/year. Why are schools such a corporate business here? They charge exorbitant fees, then ask for the entire years fee or 6months fee at one go and then keep raising it every year. And the surprising thing is, that all this money is not even for the teachers, because they don't get hikes at the same rate or at all in most cases.