The Jesus teaching that the greatest are to serve rather than be served, should be reborn in the hierarchy.
I think quite a few bishops most deeply involved were appointed by Paul VI (but raised to cardinals by John Paul II). As I understand it, the American bishops are proposed to the Pope by the miscreants in the National Council of Catholic Bishops -- someone on another thread gave the numbers, and there are just too many for the Pope to know personally; the recommendations are generally accepted and acted upon.