The is just more insentive to cut down that sort of thing in coporations. While all big companys are less effective because of organsiation, there are lots of people specially dedicated to finding usless work and cutting it away.

I know mulitble people who have exactly that job, and non of them work for governemnt.

IBM, that has existed for 100 years but they are the exeption not the rule. Most companys dont make it that long or grow that big.

I would suggest you read economic theory on this "The Theory of the Firm" by Ronald Coase is the usual place to start.

I read that paper but it speaks about why firm exists.

There are vast examples of workers not doing anything on any organization, blaming only the public sector is denial. The truth is that a company doing well has enough resources to do well even if they pay non productive workers.