The main political arguments for us to leave the EU are being currently made not by the Tories but by the EU itself. The obsession of their political elite to create a federal Europe with its own army, diplomatic corp and treasury is running into more and more opposition in more and more countries and will eventually grind to a halt as did Hitler's Panzers in Russia in 1943 and Napoleons's Grande Armee in 1812. Both wanted to create a united Europe on their terms ruled by their own elite. There is little difference between the current EU and Napoleon's Continental System of 1812. Both Hitler and Napoleon were undermined by the overwhelming natural force of winter and so weakened they could be defeated by conventional means.
Thus it will be for the EU. It will be their hubris in the face of the overwhelming force of the economic winter that will sap their strength so they will eventually fall to conventional political forces. Right now UK and other national political parties are an irrelevance but their time will come. The political pygmies will then claim it was their victory and squabble over the credit and financial spoils which is the only thing these worthless people can do.
How long will it take? Right now we are entering the Robert Mugabe period of printing money. Inflation will take off and there will be civil unrest and a general breakdown of EU structures as happened 1600 years ago with the Roman Empire! History does repeat itself. As it says in Ecclesiastes, "the sun rises and the sun sets and there is nothing new under the sun."