If you want to make a political message it often helps to be obvious. This way the meaning of your message will not be misinterpreted either intentionally or un-intentionally.

His messages were always the same politically. He was always snubbing his nose at the crown, at the art world and other rich folks who would pay millions of pounds for his art. Back in the day when I discovered him, he came off as a rebel, as most graffiti writers do.

Now? He makes millions off his work while still thumbing his nose at capitalism? Doesn't ring the same any more. You can't claim to be fighting against the same system that you use to make millions.