By Chris Dorrell The single biggest economic question facing this government is how to improve the UK’s sluggish rate of productivity growth. Since the financial crisis, productivity growth in the UK has slowed significantly from its pre-2008 trend. Sluggish productivity growth has translated into much slower economic growth and stagnant living standards, not a happy combination. Nobody is quite sure why productivity growth has ground to a standstill. Entire libraries have been written trying to uncover the reasons for the slowdown, a question that has become known as the ‘productivity puzzle’…