It pushes lawmakers to change their lobbyist-subsidized life styles.
Congress rejected the idea last year, and there are few signs that lawmakers have changed their views.
Both supporters and opponents say the pressure could push wavering lawmakers to change their votes.
Unless the lawmakers change their minds, savings will have to be found elsewhere.
The ruling said lawmakers could change the numbers in appropriation bills, not descriptions of an item's purpose.
Representatives of the groups representing older citizens want to force lawmakers to change the way the new health coverage is financed.
To collect quicker payments on surges in income, lawmakers changed the rules effective with the 1992 tax year.
The majority was achieved only when one lawmaker changed his vote to favor the ban.
Local lawmakers have recently changed rules allowing for more drilling for water, pressed by big hoteliers who want in.
And when the courts said the detention camps do fall under the laws of the land, compliant lawmakers simply changed them.