The issue focused on "transnational corporations."

Transnational corporations, including banks and other financial firms, are the biggest players in the global banking system today. They control about 50 percent of the banking system's capital, according to a report released this month by the International Financial Integrity Network.

The problem is that the banks they own control the banks they lend to, according to the report.

"It's not just a few banks; it's all these banks, and that makes their power