The private trade carried on by the members of the missions was equally unserviceable to the Chinese. It, too, took from them goods of economic value, silk and gold, which went abroad in exchange for luxury articles of little or no economic importance, such as glass, precious stones, or stud horses, which in no way benefited the general population. Thus in this last century B.C. China's economic situation grew steadily and fairly rapidly worse. The peasants, more heavily taxed than ever, were impoverished, and yet the exchequer became not fuller but emptier, so that gold began even to be no longer available for payments. Wu Ti was aware of the situation and called different groups together to discuss the problems of economics. Under the name "Discussions on Salt and Iron" the gist of these talks is preserved and shows that one group under the leadership of Sang Hung-yang (143-80 B.C.) was business-oriented and thinking in economic terms, while their opponents, mainly Confucianists, regarded the situation mainly as a moral crisis. Sang proposed an "equable transportation" and a "standardization" system and favoured other state monopolies and controls; these ideas were taken up later and continued to be discussed, again and again. Already under Wu Ti there had been signs of a development which now appeared constantly in Chinese history. Among the new gentry, families entered into alliances with each other, sealed their mutual allegiance by matrimonial unions, and so formed large cliques. Each clique made it its concern to get the most important government positions into its hands, so that it should itself control the government. Under Wu Ti, for example, almost all the important generals had belonged to a certain clique, which remained dominant under his two successors. Two of the chief means of attaining power were for such a clique to give the emperor a girl from its ranks as wife, and to see to it that all the eunuchs around the emperor should be persons dependent on the clique. Eunuchs came generally from the poorer classes; they were launched at court by members of the great cliques, or quite openly presented to the emperor. The chief influence of the cliques lay, however, in the selection of officials. It is not surprising that the officials recommended only sons of people in their own clique--their family or its closest associates. On top of all this, the examiners were in most cases themselves members of the same families to which the provincial officials belonged. Thus it was made doubly certain that only those candidates who were to the liking of the dominant group among the gentry should pass.