I like the nurturing metaphor, but in this image the educator would ultimately benefit from the achievements of what he grows. The best we have are alumni making donations to their college, taxes and of course the fees they may (and now do) pay.
Where does Open Source come into this?
Giving something away for free to attract interest, to develop future candidates for the 'main course' as an undergraduate or post-graduate.
Or if industry pays?
KMPG are sponsoring school-leavers through university at Durham and Birmingham. This model, used by the Armed Services and now firms of Accountants. Who next? PriceWaterhouseCoopers, P&G, M&S, Investment Banks and Advertising Agencies? Pharmas like GlaxoSmithKline. Hi-Tech and Low-tech businesses? What about getting my daughter sponsored buy Tumblr (she lives on it), or my son on Facebook.