By Matthew Fell Boosting the economy is the only way to sustainably raise living standards for all, so let’s stop messing around with small-fry policies, writes Matthew Fell London is a great place to invest and do business. We’ve regained the top spot from New York in the global financial centres benchmark. Our supporting ecosystem includes some of the world’s best universities. And we’ve got an unrivalled arts and culture sector. It adds up to a melting pot of finance, innovation and creativity. But one of the key ingredients is off: we’ve got a problem in our capital markets. Much angst has…