Although what you say about the entry fee for the monuments is true. Go check out Egypt. Its no difference. For the kings of valley where local pays couple of egyptian pounds, the foreigner pays 35 efyptian pounds. Local can fly from 200 egyptian pounds from one end to other where foreigner pays 650 egyptian pounds.
I think thats OK with this one, foreigners carry strong currency so paying INR 750 is no big deal to them but paying INR 200 may be a big deal for the local.