Over at his blog, A View from Ham Common , Richard Morris asks:
Just to double check - these proposals that Public Servants from the poorest parts of the country should earn less than those from richer parts do apply to MPs, don't they?
Of course it's just a thought experiment -- MPs work in London for most of the week -- but still, as @zelostreet  points out, it could be interesting to see the MPs for Sheffield Hallam, Tatton, and Inverness, Nairn, Badenoch & Strathspey explain the point to their constituents.
Currently, MPs in London constituencies get an extra £7,500  - which they voted up 157%, from £2,916, in the Commons in July 2008. But there's no difference in pay to take into account that, say, house prices in Witney, Oxfordshire, average £253,905  while in the Highlands, the average house price  is £156,966.