If your take here is that I'm interested in "rich-white-guy" problems, I'd encourage you to re-read the list from the perspective of emerging and frontier markets. Most of what I have listed there is actually more important in those places than it is in Silicon Valley. For example -- receiver-centric package delivery is a far bigger deal in places that don't have addresses than it is in the US (and billions of people around the world don't have addresses!). Ditto with energy, waste management, etc... even an open web platform is a bigger deal in India than it is here.
Personally, I spend more time these days focused on those markets (especially Haiti and Africa) than I do on the US.