It's because it's a prisoners dillema. If they do it and other companies don't, they are at a disadvantage. The only way to get proper behavior is to have the government force companies to behave.

The desires of private shareholders, which have exclusively become "give me more NOW!" are wholly incompatible with the long term needs of our species, such as homeostasis with our sole shared COMMUNal habitat. The private shareholders that dictate how our economy runs through their captured governments literally only care as far out as their next quarterly earnings/ego score report, the planet can explode beyond that as far as they're concerned, and my pet theory is that the wealth class is so egotistical, living like Pharoahs as others suffer and still needing mooaaaaaaar, that they kind of want the world to end after they're gone, as they were the only point of it ever existing from their perspective.

Our species only pays lip service to the second, because many to most of us have been successfully propagandized to believe in the lie that we may one day be in the irresponsible sociopath hoarder con-man class, whether through lottery or not buying lattes, lol. And heaven forbid we kneecap the gluttonous, destructive lifestyle we delude ourselves we'll one day have with... barf... responsibilities towards the societies that facilitated such unethical levels of antisocial wealth hoarding to begin with. Punching down looks fun amirite?

Basically the self-inflicted doom of our species that we're sleep walking towards can be boiled down to this meme:

the same reason that you're better off taking the lump sum vs the 30 year pay out if you win the lottery.

money today that i can use today is worth more than money tomorrow.

and money today that i invest now, will be worth a lot more than money tomorrow that i can't invest and get interest on

it's not responsible in terms of my company lasting a long time... but it's responsible in terms of profit.

It doesn’t.