He's basically a court jester. One guy is allowed to criticize the king, as long as he's funny about it, so that then the king can act like it keeps him grounded. "Ah yes, that limerick about how my doo doo ass stinks worse than a stable of mules is really a metaphor about being pious and cleanly so I can better fulfill my mandate."
If Brian were also making insane amounts of money. I'm not convinced that Banksy isn't just a really effective grift...
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He's basically a court jester. One guy is allowed to criticize the king, as long as he's funny about it, so that then the king can act like it keeps him grounded. "Ah yes, that limerick about how my doo doo ass stinks worse than a stable of mules is really a metaphor about being pious and cleanly so I can better fulfill my mandate."