You appear to be ignorant of the history of the British Empire and the role the Scots played in it. One point worth mentioning: the motivation for the union between England and Scotland was that the Scottish had bankrupted themselves in their own attempts to form an empire (Google the Darien Scheme). The Scots were not conquered; they voluntarily joined the Union.

The British Empire was not the English Empire, and the Scottish played as much of a role in its formation and administration as the English.