Office work or rather every work is productive. What is not productive is not work. You need to record production data and transactions, make correspondence with buyers and sellers, advertising agencies, banks and insurance companies. Thus office activities are inseparable part of commercial activity. Any management or administration in any sector of human activity is not conceivable without office.
The very survival of any organization depends on the productivity of each and every individual.And it's a different question if someone is not doing job properly.In any commercial organization regular evaluation is done and if anyone is found to be wanting appropriate and corrective action is taken!