That seems to be no point at all unless you are suggesting that all the working class are Chavs? Is that the point of his book?
Which would be a little like suggesting that any sub-set of a group can be used to define the group itself. When I grew up in my thoroughly working class home the particular sub-set of the working class that people looked down on were the Skinheads but nobody ever though define all working class folk as skinheads.
I would still define myself as working class and have a very clear understanding of what that means..to do otherwise would be to betray my roots.