Here's a song based on a 1700s text brought to my attention by Dick Gaughan on the subject.
Independence AND harmony with our neighbours? Now there's an idea........
What's the spring-breathing jasmine and rose ?
What's the summer with all its gay train?
Or the splendour of autumn to those
Who've bartered their freedom for gain?

To the love of our people succeed.
Let friendship and honour unite
And flourish on both sides the Tweed.
No sweetness the senses can cheer
Which corruption and bribery bind.
No brightness that gloom can e'er clear
For honour's the sum of the mind.
Let virtue distinguish the brave,
Place riches in lowest degree.
Think them poorest who can be a slave,
Them richest who dare to be free.
Hope Dick sings this when we go to see him at Celtic Connections this year.