Bitcoins were distributed by a free market. How can not thinking that the distribution is proper be anything but a criticism of the free market?
They seem socialist-anarchist to me. (To the extent such a thing is possible, anyway.)
Certainly not any harder than it already is. We already have such a currency. The US dollar. And cash businesses get caught hiding income all the time.
If you don't plan on actually spending the money...well then you can probably come up with a perfectly legal tax shelter so that you don't owe taxes on it in the first place.
The OP criticism's of Bitcoins coin distribution is that its distribution will prevent it from ever succeeding as a functional currency. He is not advocating forced redistribution of bitcoins or changing bitcoins only that bitcoin is flawed and that a better system can be designed. His argument is unrelated to the free markets.
OP's ideas are definitely not socialist read his links above if you doubt me. I am not sure yet about the anarchist part I am still making up my mind on that one.
So you don't think that an anonymous coin that cannot be seized or frozen or tracked by the government will make taxes harder to collect? Sure government will still try and in some cases succeed but tax revenues are sure to decline if something like this takes off.
Edit: AnonyMint is a minanarchist see post above so I will concede that point =)