No compensation except as provided by law.

No county officer shall accept or receive to his own use, or for or on account of any deputy or deputies, clerk or clerks appointed by him or employed in his office, or for or on account of expenses incurred by him of [or] by any such deputy or deputies, clerk or clerks, or for or on account of his office, any salary, compensation, allowance, fees or emoluments in any form whatsoever, other than [as] authorized by law.