Such things btw has been tried in history. If you tie value to i.e. potatoes, then people will start growing potatoes that are barely edible, cause they are cheaper to grow.
I.e. it sets the wrong incentives. Same with man attendance. Also, if you do find such a standard, it would still be best to just use that standard. I.e. if Gold is chosen, then...
normally you use either gold directly or promises for gold. Not man-hours and the like, because then people need to calculate the difference, know the exchange rate and so on.
For man-hours, I would have to know the reliability of each worker in order to decide gold exchange-rate. It's better to call those "contracts", and have trained economists trade them
For man-hours, anyone would already know the credibility of whoever inked the note. It has zero relevance to the issuers muscle or skill or time. It is all about his credibility.
OK, I think this is the time for me to stop. I find the problems I bring up to make your setup into a mess, one which I would not like, and you don't seem to care. I suppose I should
kind of take your advice here, and judge the credibility of something based on experience. I judge your payment-system not to be credible based on our conversation.
... if you still feel the need to have them as an option for "payment". I.e. normal people will then not have to speculate on such values, but those who want to can.