You are quite lucky, but unfortunately many employers/clients require a great deal of accountability. Working as I do for the NYC gov't, for instance, the very existence of consultants is a political football. Minute by minute accounting of money spent on our contracts is pretty much required, because at least half of the people we are working with are actively trying to get us fired at any point in time. Our group was recently told to be careful to clock in and out for lunch or going down to smoke because the office manager, a Dept. of Ed employee, had taken to scrutinizing the surveillance footage of the building entrance and comparing it to consultant timecards in an attempt (successful in at least two cases) to get people fired.