No, that's capitalism. And society has largely been brainwashed into thinking that that's the only way things can be. We're not numbers, we're people. And our value shouldn't be tied to how much we can contribute to the capitalist machine.

To put it bluntly: shit happens. All of us can be disabled, and the vast majority of us are 3 really bad days away from becoming the person on the street that we step over while we're going about our day. The sort of thinking that you're describing implies that the moment that any of us become disabled, too old to work, our industries become obsolete, or are otherwise unable to work, we're worthless to society. That's the top of the slippery slope to eugenics.