To cut a long story short, the main way that potential growth could increase is through policies that boost productivity growth and raise labour utilisation by increasing the average hours worked and the participation rate in the labour market and by making this market more flexible and adaptable.
I would agree that the pace of reform in these areas has been relatively moderate, but progress has been made in a number of countries and the overall sentiment on the need for, and the support of, reforms is changing in the right direction.