[VanDeKoik]

a new Scottish state would have to set up an army, a welfare system, a currency and much else”

Army? They will depend on the Royal Navy, RAF, and military to protect them. The UK will be treated as a buffer state.

Welfare? They are promising everyone free money. I guess oil money is what they are hoping to pay them off with.

Currency? They will either hop onto the Euro or leech off of the Pound.

[gr8eman]

Scottish banks print their own pounds in cash, not like coins from the Bank of England.
If they were smart they would sell gasoline at 5p above cost and set up petrol stations on the border with England along with restaurants, gambling etc. That's the only way they could successfully break away...like Las Vegas!!