Why  do  Physician's  carry  a  backpack ?

(Question  asked  to  me  recently  in  Quora). My  answer; 

Indian Politician’s answer; To stuff in gifts from pharma companies, Vouchers  for  hotels  in Dubai, Switzerland and Thailand and flight tickets provided by pharma companies

An average Indian patient’s answer; To stuff the loot collected in the day fleecing the patients and as commissions for referring patients for investigations and specialists.

An Indian advocate’s answer; To carry the case papers of the previous case of alleged negligence for which the doctor will be meeting him today and to carry the cash to pay the lawyer’s fee.

An  Indian  Journalist's  answer; To  carry  Stolen kidneys, stolen  male babies, Stolen  corneas, 

An Indian doctor’s answer; Lunch, laptop, books, and Adhaar card and statements required for the bank loan he has apply for  and  some  drug  samples  to  give  to  the  dhobi  who  presses  his  clothes.