Funny, I don't see it that way at all. The money is theirs, and so they are entitled to spend it any way they want, whatever the economic conditions. And so far as anyone knows, no significant public money is being spent to subsidize the affair (unlike, say, Michelle Obama's high-living trip to Spain).
If there's hypocrisy afoot, it's in the fact that the Clintons can spend money like drunken sailors -- thanks entirely to the money they've earned as a result of their "public service" -- even as they systematically espouse high-tax policies that makes it harder for those in the private sector to achieve the same level of success.
I wonder if Americans will ever get tired of watching the lifestyles of those who have become rich and famous thanks only to having held "public office" -- that is, spending the money regular people supply through what seem like ever-higher taxes.