Is this the most important chart in British politics?

Ed’s speech draws heavily on the thinking behind Simon Rosenberg’s “The Most Important Graph in American Politics” (as covered in detail by Patrick Wintour).

Using ONS, OECD and DWP data, Jeremy Cliffe has reproduced the chart for the UK economy. It shows that, as in America, the productivity gains and growth of the pre-crash boom years did not translate into a major boost for household incomes (particularly amongst middle earners).