London ? Top finance officials from rich and developing countries agreed Saturday to curb hefty bankers’ bonuses, but the proposed crackdown on excessive payouts so far falls short of European demands after the U.S. and Britain shied away from imposing a cap.

The Group of 20 finance ministers also pledged to maintain stimulus measures such as extra government spending and low interest rates to boost the global economy, warning that the fledgling recovery that provided the backdrop to their meeting here is by no means assured.

“The financial system is showing signs of repair,” said U.S. Treasury Secretary Timothy Geithner. “Growth is now under way. However, we still face significant challenges ahead.”