JPMorgan Chase & Co. Chief Executive Officer Jamie Dimon said U.S. policy makers need to muster more willpower to overhaul rules and fiscal policy, emulating European leaders who are committed to solving their debt crisis.

“A lot of bad policy has been a wet blanket on the economy” in the U.S., Dimon said today at an economic summit in Miami, calling on Congress to overhaul regulations and tax laws. “I’d like to see more pro-growth policies that make it easier for the whole system to run.”

While Europe may remain a “roller coaster,” the Continent’s leaders “have the will” to tackle problems, he said. “We know exactly the way,” he said of the U.S. “We don’t yet have the will.”