Are farmers not in charge of essential duties? Are people working at electric plant, building houses, plumbing, manufacturing clothing, in charge of essential d

Are farmers not in charge of essential duties? Are people working at electric plant, building houses, plumbing, manufacturing clothing, in charge of essential duties? How should they be paid? There shouldn't be a market price for that? And who among us are performing non-essential duties? What does "essential duties" even mean? Should all so called essential duties be publicly funded? If so, by who? by the remaining of us who are providing non-essential duties?