The Mechanized Man

When dead limbs and cells in the human body can be replaced by machinery, no one thinks there's anything wrong with it. That is, until the world's first fully mechanized person appears. It inherits everything human beings have: social status, wealth, family, memories… It cannot die. It lives forever, and claims an ever-growing share of society's resources… Then more and more mechanical people like it appear. The scales tip in an instant. How are humans with healthy limbs, who have no time or means to become immortal machines, supposed to survive?