Except as herein otherwise provided, the State shall never assume, or pay the debt or liability of any county, town, city or other corporation whatever; or any part thereof; unless such debt or liability shall have been created to repel invasion, suppress insurrection, or to provide for the public welfare and defense. Nor shall the indebtedness of any corporation to the State, ever be released, or in any manner discharged, save by payment into the public treasury.