Either way the morality debate seems irresolvable, which is why I wish people would debate tax policy and focus on the system instead of calling people evil and hoping they consistently act against obvious incentives.
I think a lot of people (myself included) would agree on this and fail to agree on what qualifies. For example, if somebody earnestly believes they can do more good with the money than the US government, even if they're wrong, is it evil for them to try to legally influence lawmakers? I'm not sure that's evil, but I don't need that individual to be evil to believe you should reform the laws that let them do it.
It seems way easier and more productive to demonstrate that a law is failing to achieve its intended effect than it is to demonstrate that a group of people are evil so we can all be mean to them on the internet and hope it makes them stop.