I believe this was discussed on here before, but can't remember any specifics.
The SNP has stated that it will not adopt the UK governments change to the 40% tax threshold:
SNP will not adopt UK Chancellor's 40p tax threshold change - BBC News
Therefore, someone in the UK military earning more than £43,387 faces paying a different amount of income tax depending on whether they are living (based?) in Scotland or England. While the difference may not be huge to start with, the UK government is talking of increasing the 40% threshold to £50,000 by 2020, while, if the SNP continue to increase their threshold by just CPI, it could be around £45-46k by 2020, giving a difference in the individuals tax bill between England (+ Wales!) and Scotland of around £800-£1,000.
I believe someone pointed out before that there are some financial benefits of living in Scotland, free prescriptions, education, etc, which may be considered 'compensation'.
Will the MOD be doing anything about this situation, or will it just be a case of 'it goes with the territory' - literally?