Agreed Alpha - I do not see it as his asset to dispose of or utilise other than as prescribed by the tenancy agreement. The comment is more to the point of the prevailing 'moral' set being used to approach all things caring.
This individual is a disgrace - and as an officer of the law should really be setting a better example than a Member of the House of Lords or another parliamentarian. It would tickle my funny bone though to find out if he had sublet the home to an MP previously who had then claimed a second home allowance on it - that really would be the icing on the biscuit.
I think other posters have been accurate in stating that this issue must not be in place of concentrating on the real issues of lack of supply and affordability. Letting our masters of the hook each time they can come up with an example of abuse would be wrong. As we know, abuses are rarer than the proportion reported - if the media printed a story about every non-subletter and every non-benefit fraud case newspapers would be multi edition phone book sized publications every day.