Crazy thing about the idea of bonfiring EU regulations is:
1. When queried, the majority of businesses do not want this.
2. Any business that wants to trade abroad, which is either an inevitable requirement or current business model of every business that seeks growth, will have to follow those regulations anyway to do any trade with the giant close market that is the EU so all scrapping them would do is require even more checks from the EU marketplace and thus make that even more difficult than it already is.
So it's something that appeals to a certain wing of the public and the politicians but goes against the wishes of those it claims to be for.
Take GDPR, most UK businesses already host all data in the EU anyway because:
a) Earlier on, the UK lacked any of the large cloud infrastructure providers whilst Ireland and Germany both invested in getting them setup there.
b) Other regions have requirements of providing data when requested to the state that break EU privacy regulations.
c) Now that some have UK hosting, there's too much concern that the UK will scrap the GDPR protections or introduce requirements that break GDPR, so moving data into the UK or starting with the UK hosting is too risky.
So scrapping the GDPR protections benefits no business and puts citizen privacy at risk, whilst preserving and guaranteeing their preservation solves (c) and thus increases the server hosting business that could be done in the UK.
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On the "who would cost me personally more" argument, well probably Sunak because of higher taxes but I don't care about higher taxes for me so long as they deliver value for others. I value an effective NHS and schooling system more than an extra 2% in my pocket. I vote for who will help those who need the help, not who will benefit me personally, and generally regard the notion of voting for whoever benefits you personally at the expense of people who need help as both short sighted on a practical basis (benefits to everyone trickle up, benefits to you rarely trickle down) and a monstrous on a moral philosophy basis so *shrugs*.
Then again, Sunak does score better with Labour supporters than Truss in polling and I definitely fit into that mold (even if I'd be voting Green if we weren't a first past the post system), so maybe I'm just a living stereotype