Hourly pay rewards presence, salary rewards availability, and paying by the job rewards speed. Owners writing rules to correct behavior are usually correcting their own incentive.
The order matters considerably more than the effort, and two of the steps take under a minute each. Almost all of the eventual cost is set before lunchtime.
Most families use all four and rarely decide the proportions on purpose. The order they are drawn on changes the total cost of the degree considerably.