The UK may become more isolated, but if we have an higher standard of living and a better NHS and Social Care system it is a price worth paying.
How will we achieve this?! By ceasing to give money to the EU.
The UK benefits about 8-fold from the money paid to the EU, in the form of access to the world's largest and wealthiest market, the savings gained from sharing the cost of organisations such as the Medicines Agency and through operating in a community with common regulations.
The thousands who have already lost their jobs because of Brexit are not experiencing a higher standard of living. The millions of people in the UK whose jobs are entirely dependent on the UK's membership of the EU are not looking forward to a higher standard of living - they are worried that they won't have a job by next Christmas.
Assuming that the UK thought it could get away with not paying the £39bn for existing commitments, this money has already been spent - £20bn on new customs facilities, £billions on Brexit planning, £billions on recreating and duplicating all of the Agencies that were previously shared with the EU, £billions on Galileo, £millions on ferries, both real and imaginary and so on. Plus the future cost of unemployment benefits to the million car and manufacturing workers who will lose their jobs, and the cost of similar benefit payments to those whose jobs are dependent on the spending power of those workers. Add in the loss of tax revenues - from the loss of income tax to the loss of corporation tax payments as Easyjet, Sony, P&O, Dyson and so on and the balance sheet looks very bad.
Rather than benefitting by £350m a week, Brexit is already costing the UK £500m a week before the country even leaves. Once the pound plummets and the cost of basics increases, very few will have a higher standard of living and there will be no money in the tax kitty for a better NHS or Social Care system (both areas which are about to face a staffing crisis as the EU employees accept the UK's invitation to bugger off back to where they came from).