The advantage of such a system would in the first place consist in the economy of metallic money. In the second place it would furnish the State with information as to the extent of everybody’s fortune. The State would then be in possession of the information necessary for setting up an equable scheme of succession duties which would gradually suppress the hereditary transmission of acquired fortune. Such gradual suppression would result in the total extinction of the fundamental injustice of modern society, namely, the inequality of opportunity.[684] It would also help the application of that other principle of distributive justice, namely, “to each according as he produces.” The idea is Saint-Simon’s rather than Proudhon’s. The scope of the proposed reform is quite clear. Social accounting, according to Solvay, is a mere element in a more general conception, that of “productivism,” which in various ways is to result in increasing productivity to its maximum.[685] In all this it is impossible to see anything of Proudhon’s ideas. With the exception of the suggestion of suppressing metallic money the fundamental conceptions are utterly different. M. Solvay makes no pretence to ability to suppress interest, and he never imagines that money is the cause of interest. The cheque and clearing system is a mere device for facilitating cash payment. It has nothing in common with the Proudhonian system, whereby circulating notes are supposed to place credit sales and cash payments on an equal footing.[686] The most serious objection to Solvay’s system lies in the fact that the suppression of money as a circulating medium must also involve its suppression as a measure of value. It seems difficult to imagine that the universal cheque bank with no monetary support would not result in a rapid inflation of prices because of the superabundance of paper. But although the particular process advocated by Solvay is open to criticism there can be no objection to his desire to diminish the quantity of metallic money or to further the ideal of equal opportunity for all. The project was never successfully put into practice. Like the cognate ideas of “the right to work,” “the organisation of labour,” and “working men’s associations,” the idea of “free credit” has left behind it a mere memory of a sudden check.