Who Benefits from The Jones Act?

In the words of the Economist, Henry George..."Protectionism in all of it forms does to your own people in peace time, what the enemies will do in wartime. And, what do the enemy wants? The enemy will want to cut you off from International Shipping...". - The Jones Act does this all the time to the State of Hawaii, and to the U.S. Territories of Puerto Rico and Guam, and with no war in sight. Today's modern times enemies is the few companies that runs the Shipping Industry Monopoly.