This is why notes are signed by individuals and not in the name of "entities".
Business Entities are the disguises that malevolents use to prey upon individuals.
Hm, I was thinking more along the lines of "illusion in a good way", as in thieves stole the gold of a customer, let's replace it for him, cause it was our fault it got lost.
You are quite right that the trust that this helps building will be abused sooner or later, but my point was more that at least short term, "gold" is more reliable than "workhours"
One ounce of gold of purity x replaces another similar ounce, and when you got it in your hand you got it in your hand. Workhours depends a lot on who works, and so on.
I mentioned earlier, an "1 Hour" voucher will probably evolve to not be a work hour. It is just intended to be a valuation of someone being present. This has another usage: security.