Here is one source:
The total sum [for the new proposed bailout] is equivalent to more than two-thirds of Britain's annual GDP of Â£1.4 trillion.
Here is another:
That is equivalent to a total U.S. bailout of almost $10 trillion (about 2/3 of GDP).
One Calculated Risk commentator states:
this is a bad reality game show…
when does the audience get to vote?
Addendum: Do note that is the gross flow of cash from the government, not the net financial cost or the net social cost.