In response to the justified griping that the Republican House Members' Pledge omitted renunciation of earmarks:  Propose legislation permitting opponents' omission from campaign finance laws in an amount equal to the amount of the earmark.  Thus a $10 million earmark for a district/state allows each and all of the earmark sponsor's opponents $10 million in campaign funds raised in whatever way they choose--no reporting, no maximum contributions.

Offered in the spirit of Federalist 51:  "ambition must be made to counteract ambition."