Work from home has ended..

I work in a huge mnc which usually outsource their employees. We've been working from home as usual but now it is coming to an end and the management has told us if you don't come to office by this week then there will be “strict action” against you. I don't understand if the clients doesn't care if the work is getting done with more productivity and if the employees are comfortable why are they going to this extra mile to calls us to office.