If there is a single global problem that almost everyone agrees needs to be tackled, it is income inequality. It’s a bigger deal in some countries than others: bad in the US, less so here (thanks to relatively aggressive tax and spending policies). But it’s a problem everywhere.

Of course, there is a vigorous debate about why we have so much inequality around the world, or what policies should be adopted to do something about it. But the simple fact is that a lot of people don’t earn very much. Redistributive welfare policies, ,  and strengthening trades unions are usually on the proposed menu of choices.

Read more: Want to solve income inequality? Simple: pay workers more