Sorry. That just isn't true.That is unadulterated nonsense.
Nearly the entire Libertarian element of the Tory Party are in the ERG. Conservatism is essentially classical liberalism based on respect for individual rights, protected by law and with a limited role for the state - it's why the EU has been such a problem for the Conservatives for so long.
As for hedge funds and business, they're well represented on both sides of the argument, albeit the corporatist dinosaurs in the CBI want to Remain, largely because the chance to compete globally might reveal the shortcomings of their senior management.
If you really are interested in this stuff, why don't you read a decent book on political philosophy rather than posting vehemently with such obvious knowledge gaps?
The economist of choice at the ERG recommends running down the entire manufacturing and agricultural sectors.
Parts of the manufacturing sector are highly successful full of highly skilled highly paid jobs. A party, or party within a party that advocates destroying successful business is no longer a party of business.
Aerospace and automotive aren't rubbish inefficient economic drags. Quite the opposite. Removing market access and imposing WTO tariffs will destroy those sectors.
All because a thin majority of little Englander xenophobes stuck in a black and white war film of their own imagination can't accept the reality of the 21C world