Personally, I think we should be appalled any time a publicly appointed official (or their spouse), and that includes members of Congress, aren't good stewards of the taxpayers money. Pruitt has taken it to extremes for the most ridiculous reasons. He's afraid of the environmentalists. When he is spending on his travel for his safety, I'll bet he is not worried about the safety of his staff and makes them fly coach. I'm not smart enough about environmental issues to know if he is doing the right thing or not. But I do know that when he is using the agency's money for himself, there are things that aren't being funded by the funds were intended for.
And this is not a left or right issue, this is an issue no matter what adminisration is in power.