I cannot speak for companies who don't properly compensate their employees. Kami nganhe sa (toot) are being treated well. management has the common sense and foresight to NOT crap all over their employees.
It is only common sense that an unhappy worker is an unproductive worker. and what happens if productivity falls behind? the failure to achieve overall goals/targets of the company which can heavily affect revenue. and so on. it is like a snow ball. No manager wants to deal with a huge snowball of a problem, especially if it hits them without warning.