Taxes flow from Scots to London bar the Holyrood income tax.
All VAT, income tax, NI, dividend income, savings tax, IHT - all to London.
Of the above, we get back our so called subsidy via Barnett.
From Barnett funding is then decided for tbe devolved areas of responsibility like the NHS.
It is a critique of the entire UK that HM Treasury chronically underfunds all areas bar London & the SE.
Independence grants full financial leverage. And the currency issue? A country can use whatever currency it wants with the caveat that the issuing country of that currency can push interest rates up to make it hard.
Rejoining the EU issue? Spain has also said that they WOULD NOT block Scotland IF London gave up Gibraltar. That little side issue is ignored by unionists.