Many people don't need to work a 5-day week, and I'd argue they'd be even more productive if they were allowed to work only 3 days, or in some instances even 2! Win-win, IMHO.

The public sector is full of such people faking work, or doing just the absolute minimum, knowing well that they can't get fired. This is one of the main reasons why top politicians usually outsource critical work to top consulting firms, instead of relying on their staff.