[desdiv]

In USA's case:

USD $1 million + tax on the worldwide income of a millionaire for 5 years + spending of a millionaire in the national economy for 5 * 182 days + tax on the worldwide income of a millionaire for as long as he remains a citizen plus 10 years afterwards

In UK's case:

£1 million + tax on the worldwide income of a millionaire for 6 years + spending of a millionaire in the national economy for 6 * 182 days

You mentioned 2,3,4 years for the indefinite leave to remain and the powerful non-domicile tax status, all of which are true but irrelevant to this analysis. Anyone trying to gain citizenship through the investor program must be a tax resident for at least 6 years.

In Canada's case:

CAD $0.8 million + tax on the worldwide income of a millionaire for 3 years + spending of a millionaire in the national economy for 3 * 182 days

In St. Kitts's case:

A one time payment of USD $0.25 million

[elastine]

The UK does not tax worldwide income. In fact, if you hold your money in an offshore account, you can declare yourself a "non-domiciled" UK person. This special category exempts you from all tax on foreign income in exchange for a small fee.

It is not for no reason that every corrupt Russian oligarch and oil baron and African dictator flocks to London.

[desdiv]

>The UK does not tax worldwide income.

UK does not tax worldwide income based on UK citizenship, but it does tax worldwide income for all UK domiciled residents, which includes all citizenship-seeking immigrants.

Your trivia on the non-domicile status is interesting, but both the grandparent and myself have already mentioned it, and I specifically said that it's "irrelevant to this analysis".