G20 outsiders?

I wonder if Spain, Austria, Belgium, The Netherlands, Poland, Sweden, Switzerland, Malaysia, and Thailand feel at all slighted, to be outside the G20? And why the hell is Spain not listed, when it's in the top 10, and yet Saudi Arabia is in G20? Don't give me the "EU" excuse, the UK, France, Germany, & Italy are all part of the EU and they each have their own reps.