...the negative impact of what it takes to accumulate that sort of wealth override the casual sympathy for the submarine situation.

Long way about it, those in the submarine represent why there's a refugee situation.

This statement very well sums up where my sympathies lie on the subject. A "philanthropist billionaire" is an oxymoron: nobody fairly accumulated a billion dollars without exploiting somebody else for it - their time, their labor, their resources.

Those billions could materially improve the lives of tens of thousands of people. If they distributed that wealth equitably, philanthropically, they would no longer be billionaires.