TIM Robbins' and Susan Sarandon's mission to protect the poor and needy doesn't apply to their Greenwich Village neighborhood. The Oscar-winning liberals recently attended a Landmarks Preservation Commission hearing to oppose St. Vincent's plea to build a new, larger hospital on West 12th Street, three blocks from their home. This despite their support of causes like UNICEF and Champions for Children. "The hospital provides $40 million in care to the indigent every year," one proponent told us. "Robbins dismissed more than 100 people rallying in support of the hospital - low-income, union workers and veterans of the AIDS crisis - as 'those people out there.' " Sarandon said in a statement: "Improving the hospital is a great idea. However, this can be accomplished without compromising the neighborhood. St. Vincent's should consider the proposed alternative solutions." Robbins declined to comment.