The Catholic church is not immune to corruption, which is always a temptation for public officials, Pope Francis said in an interview picked up by Vatican Radio."There is always the temptation to corruption in public life -- both political and religious," Vatican Radio quoted Francis as saying on Friday.People who live in luxury and decry poverty lack credibility, Francis said."The Church must speak with truth, and also with testimony," he said."If a believer speaks about poverty, and leads the life of a pharaoh (ruler) -- this cannot be done," the Pope said.