Today there is a good article in the Times Business section by Simon Nixon. The Times is behind a paywall, but I'll type out some key bits.
Clearly there was strong support for Brexit among many who were not economically disadvantaged.
A case in point is the strong support for Brexit in some quarters of the City of London. Few square miles in the world can have benefited more from globalisation. There is no polling data on how financial services industry workers voted, but while many of the big financial institutions adopted an official pro-Remain position, anecdotally it seems clear that there was strong support for Brexit in certain markets, particularly hedge funds, asset management and insurance and domestic-focused equity markets. One senior banker reckons that up to 40 per cent of participants in every meeting he attended this year were enthusiastic Brexiters.
Yet perhaps this is not so surprising. The rising tide may have lifted all boats, but it did not lift them all equally. Globalisation - and in particular the transformation of the City into Europe's financial centre as a result of the creation of the single market and the euro - brought about a revolution in the City and many of the old City elites did indeed find themselves "left behind." Until the Europeanisation of London began in earnest in the 1990s, the primary business was British firms raising capital for British companies from British institutions and wealthy families.
....
A successful City career today hinges on the ability to forge relationships with a new technocratic class of European managers, rather than a few hundred families. A smattering of Latin and Greek from a top British university is less useful than fluency in half a dozen modern European languages or an advanced degree in economics or mathematics.
Power has shifted to a new elite. Only one of the six biggest UK banks, HSBC, has a British-born chief executive...
Many City Brexiters insist that they are motivated by a desire to take back control of the UK from an interfering Brussels bureaucracy. But the strength of Brexit support in the traditional domestic capital markets points also to a desire to retake control from a new elite and reassert the political influence of domestic capital over British institutions. In this, they would appear to have broad support in the country outside London. In this respect, Brexit can be seen not so much as a revolution but a counter-revolution.
A lot of this jibes with the things City workers in my home-counties neighbourhood have been saying for the last couple of months. It's not just the poor who don't want to compete on a global field, everyone wants to be protected, including a comparatively privileged middle class. Not sure Brexit will deliver, but there you go.