My comment to John Redwood today - Income Tax
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Long term tax planning for retirement will tend to become impossible when the financially adept will need to be fleet of foot to constantly minimise state theft.
The alternative is world government, a ghastly prospect and one that requires the complicated planning outlined in your post which makes the dangerous assumption that the goal posts will remain static.
Transnational ‘Pop Larkins’ IMHO will continue to be the longer term gainers.