Instead, in his Critique of the Gotha programme, Marx speculated schematically that from the "total social product" there would be deductions for the requirements of production and "the common satisfaction of needs, such as schools, health services, etc" which latter deduction "grows in proportion as the new society develops", and, of course, deductions "for those unable to work, etc". After these deductions the workers could divide up the wealth produced by their labor and everyone could be simply given a "certificate from society", which could then be exchanged for products. This schematically introduces a means of exchange ("the same principle" i.e. money) in socialist society but with the speculative element removed.