Many of the problems faced by Muslims currently are caused by a lack of integrity among those entrusted with power, said Deputy Yang di-Pertuan Agong Sultan Nazrin Muizzuddin Shah.br br In his address at the national-level Maulidur Rasul celebration to mark the Prophet Muhammad’s birthday on Tuesday, Sultan Nazrin said most of the problems are due to a scramble for wealth in a manner that is not proper and transparent.