Twice a year, the chairmen and chief executives of Europe's biggest banks gather in secret. They meet under the auspices of a hush-hush club formed after World War II, whose operations are so mysterious that even the grandees who attend it seem unclear what it's really called. One bank supremo told me its name was the Instituts d'Etudes Financieres ... another that it went by the moniker IIEB. Either way, what I can tell you is that it attracts a pretty high calibre of banker - and that its last meeting was just a few weeks ago at the plush London hotel, Claridges, where the main item on the agenda was the topical question of bankers' bonuses. Present were ... Stephen Green of HSBC, Philip Hampton of RBS, Marcus Agius of Barclays and David Mayhew of JP Morgan Cazenove, and their counterparts from Germany, Italy, France and so on. Now, let's be clear: the idea that banks would ever collude to solve a mutual problem would be an outrageous and unwarranted slur. That said, they would dearly love a collective agreement to cease hostilities on bankers' pay, because they know there is a one-to-one correlation between each million pound bonus they pay and damage to their reputations. But although they explored whether they could reach an entente on capping bankers' pay, they abandoned the ambition as a hopeless cause. Why? Because they can't get the Americans into the room. So what is the going rate for RBS's top profit generators? Last year, when the bonus pool was 900m [over $1.3 billion] for the investment bank, several hundred of its executives earned more than a million pounds each. [This year] quite a number of its top traders will be expecting $10m plus.