Perspective from a civil servant
I have experience working within the system in several benefits and I 100% agree with the polemic behind this film - many of the rules and regulations are overly harsh and the bureaucratical side of passing cases back and forth leads to an objectivity that results in extremely harsh decisions for many claimants - and the film got the lingo and balance (in my experience) of decent staff to jobsworths about right.
HOWEVER - Paul Laverty's script is terrible anytime it tries to engage in actual human drama as opposed to staging scenes of righteous indignation (even these end up hackneyed by the time the Martine McCutcheon-alike lead arrives on the scene). The lead actress was actually really good but given material beyond cliche that just piled on the misery mercilessly, and the equally impressive lead couldn't even save the awful speeches his character was forced to deliver. And don't get me started on the token Scots that turn up here and there. The ending had people in my cinema wanting to shout at the screen and some laughing.
I still like it overall but the first half is much stronger than the second and a little subtlety wouldn't have gone amiss. Loach should ditch Laverty if he really is going to continue making films into his eighties because his directing style isn't strong enough to make up for this kind of soapy/greeting-card sentimental material.
IMO of course!