This is one of the examples which i gave u which throws light on the mentality of many lower rung which you were saying :) , irrespective of departments. PWAY gang men are no different,
What u have seen is 1 or 2 in place instead of 5 or 6 , then do you think quality working happens ? They may be Contract/Permanent , The entire gang has so much to cover than 7+7 u mentioned. So here the effective work done is 1/5th.