It is not completely ridiculous.
While investment banks and the like do make important contributions, their industry just recently had a negative effect on the WORLD economy due to their shady practices. Then when it hit the fan, they used their influence to socialize the risk/losses while still keeping the profits. So the taxpayers lose, and they still win, even when it was their poor decisions that caused the mess.
Some would say that because of the above, any benefit they provide comes at too steep a cost. I certainly understand that not all participants in the finance industry should be painted with this same brush. But none of this has to do with "communistic ideals". And you don't have to find money distasteful to find it distasteful when taxpayers are footing the bill for the mistakes of others.
I'm not saying that I agree with the article (I haven't read it yet). But I would hope that it is not that hard to understand why the finance industry is not very popular...when you put everyone on the planet at risk, that is the kind of blowback you can expect.