Forget complicated arguments about the benefits of public banking.
Instead, look at this chart from Business Insider:
49 out of 50 U.S. states are still showing less economic activity than a year ago, based on February 2010 coincident economic indicators from the Federal Reserve of Philadelphia. The chart below is organized from top to bottom, from the most growth in economic activity to the largest declines in economic activity.
North Dakota (ND) is the only state to currently have a higher level of economic activity year over year. Its February 2010 economic activity was 1.1% higher than February 2009, as shown by the green dot in the chart below.
Net-net what this tells us is that 49 out of 50 state economies are still underwater on a one year basis, and 28 out of 50 are even still falling vs. November.
North Dakota is the only state with its own public bank.