That's true in a general sense; but it's not an ethical imperative to do more work than required in a capitalist society. You are paid either by the hour or by the month; if you do more than what it takes to not be fired, the excess is stolen by the capitalist. If everyone both did less and consumed less, on purpose and in coordination, it would be a "soft" general strike, which would go a long way towards overthrowing capitalism.

That's not how any of this works. This reads like voting with your wallet. Your can't do collective action alone

You can't go on strike on your own, you're just forcing others to cover for you until you get fired. You can't slow work on your own, you're just not pulling your weight and forcing others to pick up the slack

You know what they call it when everyone independently consumes less and works less? Market conditions.

It's already happening now, and companies will never think "what if I paid my workers fairly and skimmed only a sustainable amount off the top...". No, they will learn the wrong lesson every single time, because it's their job to do so

The organization part is not optional.