Caste is determined by birth- a child is "born into" the caste of his parents. Caste is never a matter of choice. One can never change one's caste, leave it, or choose not to join it, although there are instances where a paerson maybe expelled from their caste.
There is an over helming support to democracy all over the world because in democratic country people are free to make their choices and they are not discriminated. Government not only looks majority They also looks for minority.