I do not care for the Obamas. I did not support President Obama in either of the elections, and I thought he was a pretty lousy president and I'm really glad he's out of office.
That being said, It's her money and she can do with it whatever she pleases. She earned it, it's hers to spend, even unapologetically.
The hypocrisy is that she champions income redistribution and states publicly that, "We all need to take a smaller piece of the pie," then goes upstairs and orders a $450 lunch. She talks about the greed of the wealthiest 1%, and then buys an $18,000 outfit. Fine with me. You can't tell me "income redistribution" and not practice it yourself. So you must not *really* believe it or you'd be doing it. Case closed.