Could it be that the expectation for all companies, everywhere to grow at a constant rate is not reasonable?
Could it be that the expectation for all companies, everywhere to grow at a constant rate is not reasonable?
The difference being that your example would at least enrich the soil and potentially improve future yields (like R&D), while buybacks are essentially just propping up the stock price with no fundamental contribution to future success.
Big tech companies hoard cash because much of their business model depends upon being able to buy up potential competitors before the competitor can take over their market, and they need liquidity to do it because things move very fast in tech and delaying even a couple weeks can mean the price goes up $100M. That's why you see purchases like Instagram for $1B, YouTube for $1.5B, DoubleClick for $3B, or WhatsApp for $19B. And they often make rates of return far, far in excess of the purchase price of these - YouTube is estimated as being worth $75B now. They're not holding cash for the sake of holding cash, they're holding cash as a punctuated-equilibrium investment strategy where they spend a lot when the right opportunity comes along and sit back and wait for the right opportunity to come along the rest of the time.
They didn't just write a check for $19B.
https://qz.com/393093/the-mysterious-fund-in-the-desert-that...
Too much cash can also lead to behavioral finance issues down the road as well such as companies making ill-fated acquisitions such as Microsoft did under Ballmer's helm.