Yes, a lot are migrants. But what I see here in Andalucía is a lot of young adults sharing their life and costs with their parents. The state consumes over 60% of GDP - the private sector  is shrinking and it's getting worse

TomK

econ

Youth unemployment in the eurozone is socially unacceptably high

From my experience living in Spain, I would say that at least half of that unemployed youth is composed by the migrants that the socialist governments are actively importing and supporting financially. 

I have tried to get statistics on how many non-nationals in Spain are unemployed but haven’t been able to get find them for the obvious reason that it’s inconvenient for the government. 

Even then, the path to Spanish citizenship in Spain in halved to 5 years if you made it there as a ‘refugee.’ I believe it should double like in Switzerland. 