By ad hoc I mean transients, hobos , hippies— people “off grid”— who want to pick up a cash job for a few weeks or a couple months e.g farm work, dishwashing, construction site, nursing, hospitality etc.

You show up to the owner, negotiate on the spot and start working.

the gig economy requires a credit card, bank account, background check , smartphone, app install etc – and all the tracking and hassle that goes with it.