In this way _Rodbertus_ claims to be able to establish a fair measure and standard of comparison for labour times, not merely between the various kinds of trades and departments of industry, but also between the various degrees of individual efficiency. Each wage labourer would be able to participate proportionately in that portion of the national product which should be assigned to wage-labour as a whole. If therefore this portion were to be increased in a manner to which we shall presently refer, there would also be a rise in the share of the individual workers, in proportion to the rise in the nett result of national production. This scheme would form the groundwork of an individually just social wage system, a system by which the better workman would also be better paid, which would therefore balance the rights and interests of the workers among themselves, which moreover would ensure the productivity of national labour by variously rewarding the good and bad workers, thus recognising the rights and interests of the whole community, and lastly, which would continuously raise the labour-wage in proportion to the increase in national productivity (and also to the increasing returns of capital, whether fixed or moveable, applied to production). I may here point out, however, that with all this we should not have arrived at an absolutely just system of remuneration of wage labour, unless we introduced a more complete social valuation of products in the form of normal labour pay instead of metal coinage. But _Rodbertus_ wishes to see his "normal _work_ labour-day"--equal to 10 normal work hours--established as a universal measure of product value as well as of the value of labour: "Beyond and above what we have yet laid down the most important point of all remains to be established; the normal _work_ labour-day must be taken as the unit of _work time_ or _normal time_, and according to such work time or normal time (according to labour so computed) we must not only normalise the _value of the product_ in each industry, but must also determine the wages in each kind of work."