Police officer and MP

The news of a police officer being slapped by a lawmaker in Satkhira's Sarsha upazila came to me like a bolt from the blue, as this is probably the first time that a lawmaker called a police officer to his office and then beat him up with his cohorts. Since then I have been asking myself whether I have been living in a democratic country or an uncivilized country. The latter one may be my question's answer though that is not enough. Hitting public servants is not new in the country and the practice is getting worse day by day as no exemplary action has not been taken yet regarding this. A few days ago a lawmaker of Dhaka city beat a police sergeant, as the hapless officer did not call him sir, the lawmaker was willing to be called by sir as the term is frequently used in the developed countries to communicate with someone, irrespective of the position of the person. In those countries even a clerk can be called by the word 'sir' as this is the sign of civilization and education.
The lawmaker beat the police officer for implicating him and his cohorts in a murder case allegedly perpetrated by them. Is it the police officer's fault? Our honourable home minister is very much vocal about certain issues.
I would like to know what action has been taken to stop such heinous incidents.