While we're talking about legal challenges, does anybody know if the issue of regional income disparity has been raised in the courts? An income of £18,600 is easy to accomplish in London and other urban areas in Southern England (but difficult to live on!). Meanwhile, it's really hard to come by, even for graduates, in other parts of the UK.
My husband and I were able to buy a house in Wales, but his job won't move with us. So he is now commuting 150 miles each week and living near his old job Monday through Friday. The extra costs are about £700 a month. If he took a salary of £500/pm less than he makes now, we'd be money ahead, less stressed, and we would have more time and money to devote to making the home improvements we need to do... but we'd be below the income threshold. It doesn't even make sense!