Psychologists deliver services so that all of society gains the most from them. Effective practice means the psychologist: (a) makes sure the services they provide are appropriate and needed; (b) upholds clients' right to the level of service they need and, where possible, helps them get it; (c) supports open and fair allocation of services; and (d) understands that their use of resources affects other clients' access to psychological services.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.