Rethinking capitalism means rethinking the role of the public sector, the role of the private sector, the role of finance, and the relationship between them all.

Companies prefer to put money in the pockets of shareholders or to hoard cash rather than to raise wages or invest.

There is a lot of flesh to be put on the bones - but there is at least an opening for a more pragmatic, less ideological debate about how to build economies that work for people, within the limits of our planet.

An interesting attribute of public banks is that they don't only de-risk the downside, but also get a share of the upside.

Fixing markets isn't enough. We have to actively shape and create them and tilt the playing field in the direction of the growth we want.

It's important that public funds be spent in research directions that are pushing market frontiers rather than working in existing areas. This means funding research not only on drugs but also on areas like life-style changes, even if the profit potential is lower for Big Pharma as you cannot sell that change as you can sell a medicine.

My specific concerns with Trump's plans are that they are likely to investments in infrastructure where the private returns are highest (for example toll roads and bridges) rather than where the public gains are greatest.