I cannot agree more with you. To me, not only is work an outdated modern concept, but it was a stillborn concept right at the beginning of modernity. Right from its inception, work was entirely dominated by capital. Surplus work is thus the only concept that is sound. Work that is entirely captured by capital is surplus work. Surplus work is overwork but it is also much worst than that, it is work turned against workers. Work turned against workers is simply a kind of expropriation. In other words, work turned against workers accelerates the automation of production techniques. For a few capitalists to appropriate all incomes generated by automated production, what is sadly needed is to trap all other people in a position where they have to kill each other to enter a constantly shrinking labor market.
Methodism has grown from a small Protestant sect to a worldwide chase against the unemployed. Capitalists believe that none-workers are wasting their life (missing their "calling") by not accumulating wealth protestant-style. Since Hesiod's WORKS AND DAYS, the Western world has tried to solve political conflits by putting the masses to work. Humanity now sees the result of this solution: for having fear to share the natural resources directly through politics, we have spoiled and polluted nature. The polytheist Hesiod was always using the plural form of work(s); John Calvin has imposed the singular form. Regrouping the various human activities necessary to maintain our metabolism allows Protestantism/capitalism to exploit human energy systematically.