Arguments for discretionary policies include:
policy rules can be too rigid because they cannot foresee every contingency.
the time-inconsistency problem can lead to poor economic outcomes.
all of the other options.
discretionary policies pursue overly expansionary monetary policies to boost employment in the short run but generate higher inflation in the long run.

One day you learn that this same wealthy friend has become active in a community organization that serves the mentally challenged and their parents. you are told that her work with mentally challenged children consumes most of her weekends and a substantial part of her income and that she lives in modest circumstances. you find this hard to believe, and you suspect that somehow she is profiting from her involvement.