How about this: the state is bad because it declares war and sends people to their deaths. Its projects often go astonishingly over budget, corruption is high in many countries, and its funding is unreliable, as it's prone to not keeping the promises of the people previously in charge.
That accurately describes almost every state that ever existed. If you have a similar list for all philanthropic institutions, that would be a good start in justifying your claim that philanthropy doesn't work, so we have to take the money and let the bureaucrats handle it.