NEW YORK ( MainStreet)--Elderly Americans have money. Their numbers grow daily. In some cases their mental capacities are diminishing. "It a horrible perfect storm for scams," said lawyer Steve Weisman, who teaches elder planning at Bentley University in Waltham, Mass. "The elderly are 12% of the population and 30% of the scam victims." The Consumer Financial Protection Bureau estimates the extent of elder fraud at $2.9 billion - but the federal agency acknowledges that for every case that comes to the attention of law enforcement, 43 go unrecognized.