It's not that they cannot. They don't have an incentive to do it.
If I'm being paid for my performance while I'm a CEO, why would I spend money today (and hurt my performance today) to fix a problem that MIGHT affect the company in 20 years
If I'm being paid for my performance while I'm a CEO, why would I spend money today (and hurt my performance today) to fix a problem that MIGHT affect the company in 20 years