I don't see a contradiction between philanthropy and getting paid a fair salary for the work you perform. Talent always needs to be compensated, lack of talent will eventually reflect in poor philanthropic results so I don't see an issue there. I am intrigued by the way you present the question because you say the main appeal of the business, is the philanthropic angle itself. If you achieve results and offer a service that caters to a real need, your customers will be willing to pay towards efficient delivery. One word of advice: be straightforward in the way you present your structure, if you hope to masquerade your intention to be profitable with clever PR you are likely to lose your customers' trust.