More then possible legal minimum for them? Approximately everyone - finding ways to minimize your taxes carries opportunity cost that may as well be bigger than the savings, though again, most people will evaluate this in terms of frustration and risk of getting it wrong. The exception are people who can outsource this to professionals - doing that is very low in terms of opportunity cost, frustration and risk, but it's an option available to the few.

So perhaps that's why wealthy people seem so tax-averse - they may be as averse as everyone, but for them the aversion is much cheaper and easier to do.

(This reflects a more general principle I summarize as: the only thing necessary for evil to triumph in the world is that good men are separated from it by enough layers of abstraction.)