That's a good question. I personally don't think so and don't pay them myself. But enough people in our society clearly do, and as long as they have the freedom to chose where they spend their money they should be able to chose to spend it on the Kardashians right?
The question of whether (or how much of) the money they accumulate should be taxed, I believe is a separate issue. I think we could tax the shit out of them, but I would caution against the notion of taxing them more than others on the basis that they're creating less "value" than other rich people. There are clearly plenty of people who highly value whatever it is they produce, and to tell those people otherwise seems like dangerous territory (at least it seems like non-democratic - i.e. when you have a government telling the people what to value).