As for cages themselves, an ordinary citizen who kept dogs in similar conditions for their entire lives would risk prosecution for cruelty. A pig producer who keeps an animal of comparable intelligence in this manner, however, is more likely to be rewarded with a tax concession or, in some countries, a direct government subsidy.
I don't believe people die from hard work. They die from stress and worry and fear - the negative emotions. Those are the killers, not hard work. The fact is, in our society today, most people don't understand what hard work is all about.