Appearing on NBC's "Meet the Press," Biden said the administration will be able to make a better case ahead of the 2012 presidential election that continuing the benefit for high earners "does not make sense."

The provision benefiting the richest Americans was a centerpiece of compromise legislation backed by the White House and approved last week by Congress to extend Bush-era tax cuts for two years.

The $858 billion package prevented an increase in tax rates, eased taxes on wealthy estates, and held in place certain deductions and the current tax rate on gifts, which are usually paid by the wealthy.

Biden said he and President Barack Obama remain morally opposed to certain tax breaks for the wealthy, but compromised with Republicans this time to preserve benefits for businesses, the middle class and low-wage earners. The bill also extends benefits for the long-term unemployed.

"They're for two years and we're going back and going at it again," Biden said. "Life is a matter of really tough choices."

Biden said he believed priorities to reduce the federal deficit that he expects to take shape in coming years as well as an improving economy should help Obama argue effectively that another extension of tax breaks for the wealthy should be rejected.