Speaking to trade unions and business earlier this week, he said: "Sectors of the UK economy with higher levels of unionisation have seen smaller falls in their labour shares. Over the past few decades, a sector like administration and support activities with under 10% unionisation rates has seen its labour share decline, while a sector like education with a unionisation rate close to 50% has seen its labour share rise."
The last ten years have been historically unusual, he added, in that employment has risen but pay has not followed.
Indeed, workers are feeling the pinch across the UK and some of those in the most insecure types of jobs are taking a stand.
Hat tip IER