SPEAK TO the world’s financiers assembled at Davos this week, and Britain rarely comes up. When it does, the mood is hardly complimentary. One banker remarks on how many millionaires have recently left the country. Another financial executive says that Brexit has shrunk the investor base. Others raise a comment by Ray Dalio, a billionaire, who warned on January 21st of a “debt death spiral” in Britain if public spending is not reined in.