Sannyasa Ashram: Position of a Sannyasi

                                                                  Q. The word 'sannyasi' means one in the renounced order of life, which also means being away from homely comforts. But how is that some sannyasis [gurus] hold administrative positions and material assets [fixed and liquid], accept material gifts and tend to lead an opulent life style [taking very opulent prasadam, jet traveling, doing shopping during foreign trips etc.] Is it that if one is spending 24 hours of his time in Krishna consciousness, he is exempted from the above rules?