Actors playing the part of Santa in grottos throughout the US have been given special training to cope with penetrating questions from children about the economy, it has been reported.Santas in shopping malls across America have been flummoxed by youngsters asking questions such as “Can you help us stay in our house?” and “My Daddy has lost his job, can you get him a job as an elf?”, according to a report in the Wall Street Journal .