“Among Boston’s arts groups, the rich get richer and the poor get poorer. Now there’s a new effort to balance the scales. Local arts leaders hope a 40-member task force set to be announced today by the Boston Foundation will generate fresh momentum on a problem the city has failed for decades to address. The task force will work from a study to be released today by the foundation that shows that while big bucks continue to flow into a handful of the city’s largest cultural institutions, donations have been declining for more than 500 Boston-area arts organizations.”