"If you're conservative you can't say people have a right to do what they want with their own money and then attack them for spending their money"

This is true, and beside the fact that some people dislike it and can't articulate what they dislike about it, so they focus on the obvious and miss the point--

We're not saying they can't spend that money however they want.

We're amused and or disgusted by the hypocrisy of attacking, and taxing, and tarring, and pre-tarring, and demonizing everyone else (all those everyone elses being anonymous rich folk who are presumably Republicans who don't ever give any of their money to charity or to needy people, since everyone knows Republicans are the party of the filthy rich hateful racists), when the Clintons turn out to be worse than the worst of the accused rich people.

So yes, you're right, you can't attack them for it, but you laugh at their inconsistency and their public face of hypocrisy and their tendency to insist that other people are demons while they themselves are saints.