Why old people are deprived?

Old people are always deprived irrespective of country, religion or vice varsa. In fact people have natural tendency to look at elderly persons with a sympathetic look. Young folks jeer at as is the case of Bus Monitor,who was subjected to abusive language. But there many unscrupulous people in the society including their own kins who take advantage of their physical disability. Sometimes they are left alone when their kins are well established in life and they are to spend their rest of life in greatest agony depending on govt. aids or philanthropic help.Sometimes they are pressurized to sign in will/court papers depriving them of their last resorts and they are forced to do with tears in their eyes. The physical disability is the main hindrance in their deprivation in the hands of peoples with boiling blood.