Smaller boutique investment banks, which are benefiting from increased mergers and acquisitions (M&A) activity, are not covered by rules introduced after the 2008 financial crisis that put limits on pay at the big banks. So they tend to pay out “huge amounts”, says The Observer. Take the three partners of Robey Warshaw, who shared £30m in profits this year, up from £17.9m in 2020, reports The Sunday Times. Former Morgan Stanley banker Simon Robey is thought to have taken the lion’s share of £20m, according to filings. George Osborne, the former chancellor and now fourth partner, receives nothing ashe joined last April, after the financial year had ended. However, this financial year ending in March promises to be another lucrative one thanks to the boom in M&A this summer, when…