So the Indian government wanted to bring attention to the severe poverty present in their country at the time and the fact that a foreigner of a non-Hindu religion could do something they couldn't do themselves?
And maybe the attention had something to do this.
From Wiki's article "Missionaries of Charity":
Missionaries of Charity is a Roman Catholic religious order established in 1950 by Mother Teresa of Calcutta, which consists of over 4,500 sisters and is active in 133 countries. Members of the order designate their affiliation using the order's initials, "M.C." Member nuns must adhere to the vows of chastity, poverty and obedience, and the fourth vow, to give "Wholehearted and Free service to the poorest of the poor".
http://en.wikipedia.org/wiki/Missionaries_of_Charity