(The Hill) — A prominent liberal advocacy group is pressing the deficit-reducing supercommittee to not waste any time in raising taxes on the rich.

MoveOn.org, responding to reports that the 12 lawmakers on the panel were considering pushing back decisions on how to raise new revenues, is calling on its members to personally lobby supercommittee Democrats on the issue.

In an email to supporters, MoveOn.org made a nod to the current Occupy protests and contrasted the possible tax delay with what it called an immediate search for “deep cuts to social programs.”

“What’s needed now is for the rich and corporations to pay their fair share — not for the 99% to suffer more so the 1% can keep their tax cuts,” the group wrote.

“If the supercommittee plan delays the decisions about who has to pay higher taxes until next year, you can be sure it’ll become just one more opportunity for the 1% to run roughshod over the 99%,” the message adds. “That’s why we have to stop any deal that doesn’t make the rich and corporations pay their fair share, while protecting critical programs — like Medicare, Medicaid, and Social Security — that we all rely on.”