Potentially because that means in 5-20 years they'll have a much bigger pool of labor available? They've already done illegal market-manipulating collusion which resulted in billions of dollars of salaries not being paid: https://news.ycombinator.com/item?id=19666545 ; in the end they got hit with fines for a few million bucks and some developers got a paycheck for a few thousand bucks (two orders of magnitude less than the wages stolen from them).
I'm just a college student, but I find it hard to not think that when I see the big companies spending tons of money to push people to learn to code.