Why cash is better than debt wealth? Сash is the actual money, i.e. common liquid commodity, not a promise to provide such commodity. Cashless money is promissory notes cleared by cash. Cash transactions are untraceable, they’re anonymous and decentralized. They require no third party involvement, and, as opposed to bank.
The history of labor cost theory is very ancient. People have long ago concluded that any product requires some time and work long ago. And, the more labor and time the product creation takes, the more valuable it is, and the higher is its cost.