It works because modern corporate governance is exclusively concerned with quarterly growth, and the negative effects of these strategies come next quarter when

It works because modern corporate governance is exclusively concerned with quarterly growth, and the negative effects of these strategies come next quarter when the CEO has moved on. You don't get a bonus for playing the long game; in a public company you have everything to lose and nothing to gain from compromising this quarter in exchange for next. One of the many reasons (alongside Sarbanes-Oxley) that some large tech companies appear to have chosen not to IPO.