One camp believes that as the UK retreats within its domestic borders, there will be a flight of capital to larger safe-haven economies, driving down the British sterling, and thereby increasing the cost of imports.
Even former Fed Chair Ben Bernanke has been irked by right wing conservatives for doing just the thing that most conservative economists, such as Martin Feldstein, and even arch-free market theorist Milton Friedman, said was the right thing to do during recessions--inject more money into the economy.