Let's say billions. Let's say I'm one of those tech billionaire and that I suddenly grow a conscience (very unlikely but, heck, I also don't have billions, not even millions not even enough to retire... so let's pretend).

What would I do with my fortune and that newly found conscience that's irking me?

• Supporting the FSF with one specific demand: for them to finish their fully Libre OS and ensure the GNU/GPL is set in stone.
• Supporting the EFF, helping them fight that dystopian society my fellow rich people (and their politicians valets) are building against the population. Edit: it's happening in real time everywhere around the world.
• And with the bulk of my money? I would be opening as many private schools as I can and making them tuition-free for pupils (say after an interview, to see if the kid is really motivated) and also making sure we hire the best teachers we can.

Why private and why tuition-free? Public educative systems have dramatically failed in most Western countries, they don’t educate kids anymore. It's a real-time nightmare that has been going on for a few decades, with dramatic consequences too few people seem to worry about. Meanwhile, private schools have not failed that bad... but they’re also expensive and therefore reserved to rich-family kids. What an amusing coincidence: quality teaching reserved to wealthy kids. So, by making tuition-free private schools I hope to give ‘normal’ kids access to the same chances rich kids have access to. And by making them private, I'm making sure to stay out of the sabotaging power of the public educative system. I would start in my own country (France, that used to be role model in education and is now a very sad joke) but I would do my best to spread the concept as widely as possible.

Edit: clarifications.