If people aren't happy with 'their lot', they vote for change regardless of what it is, or if its worse e.g Brexit !
Guess it depends whether the Scots are happy. In my experience they usually aren't (unless they've had a drink
)
Let's face it, being ruled by a Tory govt. when they are mostly nationalist/labour is going to lead to discontent. As is being forced into Brexit, when they voted to Remain.