Notwithstanding anything to the contrary in any contract, where the Government is satisfied that in respect of any Government contract the Government or any statutory corporation or any other Government agency has made to or for the benefit of any contractor or other person any overpayment, improper payment or a payment for which there has been no consideration, the Government may withhold or direct any such statutory corporation or other agency of Government to withhold to the extent of such overpayment, improper payment or other payment any moneys payable under any certificate to any such contractor or other person under any Government contract whatsoever.