Less than a week after pushing through legislation to impose a 90 percent tax on the bonuses, the House Financial Services Committee prepared a considerably milder proposal that would let Treasury Secretary Timothy Geithner and financial regulators decide if employee compensation was "unreasonable" or "excessive."

The panel was expected to endorse the measure on Thursday, paving the way for a floor vote as early as next week.

The proposal, sponsored by Democratic Reps. Alan Grayson of Florida and James Himes of Connecticut, would not force employees of insurance giant AIG to give back money already paid to them. But it would empower the government to stop future payouts by financial institutions even if employees have been promised the money.

The bill would exempt firms willing to participate in a government-sponsored program aimed at buying up $1 trillion of bad debt, or "toxic assets," sitting on the books of major banks.

Republicans opposed the bill because they said it was too vague.

"Private investors need certainty that Washington will not change the rules of the game while the game is being played," said Rep. Spencer Bachus of Alabama, the committee's top Republican.

But Democrats said it was necessary to protect taxpayer dollars. They pointed to a provision that would require Geithner to set standards to measure an employee's performance and the stability of a financial institution before bonuses are paid.