The 30-day start
Most families quit new systems because they start with all of it. Add one piece a week instead, and by the end of the month it is just how your house works.
Choose one currency, usually screens, and set the price. Tell the kids the rule once. Nothing else changes this week.
This is the week the teaching starts. When you hand over money, name the behavior out loud. One sentence is plenty.
Once the first one runs itself, add the next argument on your list. Start writing tickets so corrections move to Payday instead of escalating on the spot.
Same seat, same time, snacks if that helps. Celebrate first, settle the tickets second, and name one thing to work on next week.
Pay a flat amount for the week, say so, and start clean on Monday. Do not reconstruct it from memory.
Usually the prize is too far away. Shrink the goal, or post a bounty on something they want this week.
That is a good sign, they understand the rules. Reprice the loophole at Payday and tell them why.
Free to try. One price for the whole family, up to 15 kids.