Ethically no, you’re using free labor of people who are societally at a disadvantage. It models capitalism because you’re evolving as a corporation (financial prosperity) while the men/women in prison are doing hard labor and remaining at the bottom of the barrel (class wise). Also considering that prison environments are at the bare minimum (capacity,food,cleanliness) and still receive no type of funding to reform this issues show that big corporations have no morality/compassion DESPITE what the people might have/not done.