I take it you didn't include the rest of the UK because of the significant number of people in Scotland and Northern Ireland who be quite happy to leave the UK? :-)
[Note that I said "significant number" rather than "majority" - the Scottish independence vote is still nearly a year away]
PS - Apologies to the Welsh for my lack of knowledge as to your feelings about membership of the UK
I've seen nothing which indicates the Scottish electorate believes this is any more of an important issue than people elsewhere in the UK.
The idea that intrusion into privacy will fade away with Scottish independence is just in line with the attitude that things in general will magically get better as a result.
It's possible that the SNP have different attitudes, which they would bring with them into independence, but they have not taken a public stand on the issue, and of course they have no track record either way because the devolved government does not have power in that area.
http://www.scotsman.com/news/gchq-fears-call-for-assurances-...
[NB I am not an SNP supporter, although I am in favour of Scottish independence]
If a politician actually wanted something to change, I think they'd write a more focussed letter, with actual demands for things to change - eg how long data should be stored, independent inquiries, codified powers, public reporting of statistics on surveillance, etc.