The four channels replace the job as the way contribution gets paid. In exchange, people pay from their own credits and income, and the payers decide: artists, athletes, cooks. In commission, many local and domain funds, from a share of the automation return, pay for work people value but no individual will buy, and the people affected decide: elder care, mentoring, stewardship. In office, the public chooses who serves and an independent body sets a stipend tied to comparable skilled work. In venture, the market rewards initiative and risk.
No single body decides what contribution is worth, and there is no central contribution score. Firms still hire people, paying wages out of channel money. See how contribution gets paid.