The issue of who controlled the enterprise system is complex. While theoretically corporations are owned by stockholders, individual stock-ownership fell throughout the 1970s and 1980s, and in 1990 it was less than 30 percent. Financial corporations accounted for the remainder. Relative to capital, almost all large corporations carry enormous debt, a phenomenon known as over-borrowing. Such an unbalanced capital structure results from the easy availability of credit from the main group bank and the network of corporate relations, which reduces the need to resort to capital markets. Corporate shareholder meetings are often only window dressing. Thugs sometimes terrorize stockholders, demanding payments to vote for management or refrain from exposing scandals. The auditing system also is not well developed. Until the late 1980s, few companies engaged outside auditors, and accounting practices gave corporations room to mislead both the public and the shareholders. The law was changed in 1981 to control this kind of excess, to enhance the power of auditors, and to reduce the number of stockholders in the employ of management. But in general, it seems that business management holds the reins of corporate control, often with little public accountability. The corporate system maintains itself by smoothing relations with the government bureaucracy, expanding benefits to workers and consumers, and increasingly engaging in public relations and philanthropy.