Privileges? Are you saying that the rich don't have rights to their money and that the fact that taxes are low for them is a privilege? And if so, what property rights do you believe people have?
Property is a privilege, not a 'right' (what is a 'right' anyway?)
Property means you have power over other people, that's all.
linkWhen people acquire property, they've something to gain it, therefore they have rights to that property, as they have a claim to that property. It sounds (and I'm sorry if I'm misconstruing your argument) that you don't believe people have rights, but that they have privileges. If people only have privileges, that means that the government can take away people's privileges at a whim, which would mean that the government could arbitrarily kill people (non criminals for the sake of the argument), as people would only have privileges to live. Is this a world you really want to live in? People have rights, and people have rights to property. I can see arguments for why those rights may not be unconditionally inviolable (such as taxation and the death penalty), but I believe people have rights.
Those rich people (excepting criminals) have somehow done something to acquire that money, and have claims to that money. They deserve to keep it, and I don't think letting them keep most of that money is a privilege that we grant them.