"What do Alberta, Bavaria, Queensland, Quebec, New South Wales, Colorado, Catalunya and Nova Scotia have in common? Their regional or state assemblies all have more power than the Scottish Parliament. Do these powers threaten the existence of the nation they belong to? No - and in some of these cases, the devolved powers are necessary to keep the nation state together.
So why would Scotland gaining fiscal autonomy wreck the union?"
Answer: it wouldn't.
There is absolutely no valid reason for not devolving tax-raising powers to Scotland. The Barnett Formula is entirely discredited as a means of fairly and equally distributing public expenditure, and does more to sow seeds of divisiveness between the members of the Union than fiscal autonomy - and thus, responsibility - ever could. The English moan about it being too much (which, in terms of proportion, is true) and the Scottish moan about our hands being tied, hindering policy, and enabling them to use the UK as a scapeboat.
Look, the Scottish Parliament has legislative power over health, education, policing; we have our own legal system too - why can't we use our money to supply our needs? It makes no sense making the English, Welsh and Northern Irish pay for Scotland along with us.
The centralisation and excess of power in Westminster does need to be rolled back. I'm pro-Union personally, but I know that the greater the power of the central government, the less accountable to each individual and the more it can scam us and take more of our economic and social freedom with impunity. And in the end, money is power. Control over the Treasury is the real key to power in government.
So Calman's conclusion depresses me, in that the only reason I can see for the status quo being maintained is pure power; power for power's sake. This government have been in power for far too long.