In my opinion, governments are going to have to tax the big tech companies hard and distribute the money to funding bodies like Arts Council. I can see a future "Tech Council" for open source software organisations to apply for funding. It'll get to the point where every OSS developer has their own Community Interest Company or join with a few other devs to create a CIO in order to acquire funding.

Of course, now you're opening a whole other can of worms. In the UK, only 1 in 9 Arts Council funding applications is successful.