McCain supporters please respond. Why lease new places to drill oil?

On Sunday's Meet the Press, Joe Biden said: "This is a gift, a gift to the oil companies by John McCain. They have now leased 41 million acres of offshore leases. They're only pumping in 10.2 million of those acres. Seventy-nine percent of all the offshore oil available off the coast of Florida, into the Gulf of Mexico, the Atlantic Coast, the Pacific Coast, lies within those acres that they now have. Why are they not pumping? Why are they not pursuing what's estimated to be a total of 54 billion barrels of oil at their disposal right now if they pump? Why are these greedy fellows deciding they want to go beyond that? It's because they want to get it in before George Bush leaves the presidency. It's because they're not pumping the oil to keep the price up. They are not even drilling. You have 30 million leased acres they have right now with 79 percent of all the offshore, and they're not drilling. John says they need more? It would take 10 years for it to come online.