Only someone who sees Scotland as being junior to England could say this! Also John Swinney does not pay himself more than the UK PM so please correct that. He voluntarily returns £54k of his salary every year which is 10X as much as the UK PM returns. UK PM earns £40k MORE.
Scotland 'legally' does not have a government, it has a Devolved Assembly. Swinney may pay himself more than the UK Prime Minister which is of itself ridiculous but his standing is in UK terms that of a Junior Minister, and unfortunately for Scotland, a not very good one!