When UK governments have concealed and extracted money from Scotland ...
Can't you see what a daft statement this is?
The oil belonged to the UK of which Scotland was and is a part. There was no appetite for Scottish independence in the 70s. "It's Scotland's Oil" was a failed campaign because Scots didn't want to leave the Union despite the oil money.
My primary school teacher was an SNP ideologue in the 70s. It was very much a minority opinion although there was a brief flirtation with IRA style "Tartan Terrorism" in the 80s. Scotland was a Labour stronghold. Devolution was controversial never mind independence.
We only decided to fancy independence just as oil became worthless.