It seems to me in north of Europe if you finance your art making by yourself you are perceived as kind of a hack. You need grant, not maybe because of the money but to validate you as being part of the scene. On the other hand many of the artists are still from rich families, because it is still a gamble.
There's multiple advantages for someone who is rich even with grants:
* Time to practice their craft for years+ without worry about daily necessities. This includes getting the best training and personal tutoring to reach their full potential (whatever it may be).
* Knowledge through connections of how to properly write a grant that is going to be accepted
* Possibly knowing the people making grant decisions personally (or through family). Nepotism exists everywhere.
* If grant comes from a non-goverment institution. Family ability to donate to institutions increases their chances of picking kids for jobs or grants. If you rely on donations would you pick a poor kid who will cost you money overall or a rich kid who will actually make you money in the long run?