'Duck Dynasty' Star Willie Robertson -- Suck It Obama ... I'm a Better Tipper!

"Duck Dynasty" star Willie Robertson made an impression during the State of the Union address -- not so much with the President, but with 2 waiters who are now THOUSANDS of dollars richer.

Radio host Sean Hannity posted the pics ... showing Willie and his wife at Ruth's Chris Steakhouse in D.C. -- hanging with Sean, GOP Senator Ted Cruz, former Congressman Newt Gingrich and conservative radio host Mark Levin.

The group closed the joint down -- the restaurant normally closes at 11 PM but the group stayed 'til 2 AM ... and they racked up a $5,000 bill.

Willie grabbed the tab and left a gratuity -- FIVE THOUSAND DOLLARS! In case you have trouble computing .... a 100% tip.

Obama recently went to a local burger joint last month and left a 30% tip. Respectable but no contest.

See? Republicans don't have any problems redistributing wealth.