The Council, or any person or committee authorized by it for the purpose, shall have the power to inquire into the conduct of any department, office or officer of the City and to make investigations as to Municipal affairs, and for that purpose may subpoena witnesses, administer oaths and compel the production of books, papers and other evidence. Failure on the part of any officer of the City to obey such subpoena to produce books, papers or other evidence as ordered under the provisions of this section shall constitute and may be deemed cause for removal. A majority vote of the members elect of the Council, exclusive of any member whose removal may be being considered, shall be required for any such removal.