In fact, it may as a practical matter be politically impossible.

CENTERFORSECURITYPOLICY: Center for Security Policy | Doomsday Scenario: Aspin Nomination Sets Stage For Dellums Chairmanship, Grim Tidings For Defense Community

The reduction in government spending that occurred following World War II would be politically impossible today short of a cataclysmic crisis.

WSJ: Phil Gramm and Steve McMillin: The Debt Problem Hasn't Vanished

Politically speaking, it would be a nearly impossible feat.

FORBES: A Wild Card in the Exchange Wars

He has not yet ruled that that ceasefire has ended but it seems he is being brought ever closer to that point - that it is becoming politically impossible to maintain an argument that a cessation is still in place.

BBC: UDA mural

Those calling for immediate action may be right that losses should fall mainly on creditors in the form of higher inflation and fiscal transfers since the alternative of forcing citizens of indebted countries to bear the cost of adjustment is politically impossible and likely to lead to a collapse in the euro.

WSJ: France Is Biggest Obstacle to Solution

Germany and others argue in this instance that it is politically impossible both to encourage total capital mobility by means of a single currency, while allowing some countries within the union to act as tax havens for the savings of others.

ECONOMIST: Britain and Europe

Even if this was legally possible, which it isn't under current euro-zone rules, it was politically impossible: there is no appetite in some euro-zone countries, notably Germany, to create a transfer union, nor to bail out a country whose banking system is widely suspected to be a haven for money-laundering.

WSJ: Euro Zone Moving Into Twilight Zone