UC is disastrous regardless of whether you think this particular scenario is the fault of the system or not. It's very very scary and really changes perspective on life if you are under the threshold.
The problem I see is that a lot of posters who think it's not an issue are the ones who think benefits are only for people who are unemployed and have a very specific stereotype in mind - you all know it, I don't need to explain it.
Where the truth is that in the economy the government has created many people who are in receipt of benefits are working families who are not paid enough to cover the overwhelming cost of living. I work and have 2 small children and receive working and child tax credits, as well as housing benefit for our extortionate private rent costs, because the government has to accept that workers are not paid enough to even just get by.
One of the most abominable things about UC to me is that they are now removing the concept of tax credits, which are generally seen as a bit of a different breed to say JSA, so that when the tories discuss these issues in the media, they can perpetuate the image of the "lazy, unemployed, benefit leeching masses" instead of the reality of working families that struggle to scrape enough together to carve out a decent life for themselves and their children.