In article <bg7fl7$kt3g0$1@ID-105084.news.uni-berlin.de>, 
kgowenNOSPAM@myfastmail.com says...
> > Unearned income, dear, unearned! ;-))
> 
> How is it unearned? 
> 

You didn't earn it... other people did the work that earned (produced) 
the money. Or you might say your capital earned it by working for you.

You did not earn it because you did no work at all to get it.