As you might imagine, the corporations are absolutely fine to not only allow but promote this as well, whenever possible. Much like the banks encourage the idea that having bad credit, or breaking a contract (under the terms of the contract itself, like defaulting on a mortgage) somehow makes you a bad person.

I honestly think Mike Judge is a luminary in this area. His work on this topic in the movie Office Space is legitimately genius.

Unfortunately, by failing to reward loyalty, giving adequate raises, etc employers have made it a battle to attempt to do as little work as possible without getting fired. Just as Peter notes.