Most but not all. Economics is currently split into multiple schools which disagree on philosophical fundamentals, and is hardly an exact science. How many economists predicted the financial crisis? Those that did tend to be small government advocates. (I don't endorse everything he says, but Nassim Taleb is one example, who is also pro-Brexit).

I wish someone had made this point during the campaign, to answer the snipes that Leave was anti-intellectual, anti-expert, and so on.