I'm a hibbies supporter and the reason the Scots don't complain is the spl isn't any better than the a league.
That's something i also heard from others who follow SPL full-time.
Interestingly, Scott McDonald was excellent in SPL for Motherwell and Celtic while possibly not as prolific in EPL (for Middlesborough). Equally, he never managed to score for Australia at senior national level and was eventually omitted from their 2010 World Cup squad. I've always wondered whether that was an indication of the difference in relative league strengths, but even to me it sounds tenuous.