interesting, yes, i have heard of things like this before... in australia when i was a kid during the transition to forcing everyone to receive pay through banks a lot of people were paid "under the table" off the books... there still is a lot, but mostly that's brave entrepreneurs like i was for some time in the noughties
never got enough clientele to get anywhere even without paying income taxes, because of the many obstacles to marketing that i faced
for example, in australia, you can't have a motor powered vehicle over 200W... i needed to cover vast distances delivering my advertising and the only practical way was a scooter but that cost me more than i could pay to maintain because of taxes and shit
anyhow, i hate the "white" economy, do they even say that anymore? isn't it racist to call it the "black market" lol????!!!