The math and the fact that the current unstable condition remains(always just one step from disaster ie.. another great recession/depression).
How many more years can we avoid another one while we wait for the most or one of the most crucial sectors to become stable (ie… the majority of underwater home owners are no longer under water).
The situation is going to remain precarious at best until the condition above is no longer the case.
Were the above to happen at the current level, things will go south fast.