I've watched the whole film now.
It seems the system for claiming benefits is impenetrable, although clearly some people do manage to access it.
It is not the only system in the UK that is like that, there are plenty of other examples of obtuse, multi-layered, "coded" ways of doing things, e.g. gas and electricity supply, the rail ticketing system, the education system, social care, mental health service provision ...
Someone wrote on here that it is a system without heart (having watched the film, I agree). The question is, when last did it have heart?
I think the problem is widespread, systemic and societal.
Not that any of this helps the Daniel Blakes of this world.