When you help others, your action should not end up in harming or hurting somebody else, even though your help has been unconditional. If you have promoted a junior by superseding another who deserves the senior position, this is not regarded as helping, as the person whom you are helping will give you one blessing but the person whom you have harmed may give you 10 curses. Ultimately, you end up with minus points. Helping others also means that it should give you happiness as also to the person/s you have helped and also to those whom you have not helped.