You could set a policy that a tenshiko at any particular time is allowed to obligate any of its successors to complete some action only if she has completed an action of similar magnitude assigned to her by a previous tenshiko. Like a Ponzi scheme. The pro: this gives each tenshiko-instance an incentive to complete the task. The con: the consequences of one tenshiko-instance defecting are high, since her successors will be released from pressure to complete tenshiko’s long-term goals.
You could set a policy that a tenshiko at any particular time is allowed to obligate any of its successors to complete some action only if she has completed an action of similar magnitude assigned to her by a previous tenshiko. Like a Ponzi scheme. The pro: this gives each tenshiko-instance an incentive to complete the task. The con: the consequences of one tenshiko-instance defecting are high, since her successors will be released from pressure to complete tenshiko’s long-term goals.