Why is "random perks" bad? Isn't the best interest of the company being making the employees happy so they are more productive? The negativity around giving "r

Why is "random perks" bad? Isn't the best interest of the company being making the employees happy so they are more productive? The negativity around giving "random perks" makes it feel like you're running a prison, where the point is to punish people instead of a workplace.