You are telling me I am wrong, but it is not helpful to me unless you explain why I am wrong.

I thought it made sense. As far as I could tell, the original parable has a miser with two desires: the desire for delicious booze and the desire to save money. The latter desire is by far the more important one to him, so he "fools" his desire for booze by promising himself a booze reward, and then reneging on himself each time. In my interpretation, this still results in an overall positive effect for self-discipline, because the happiness of saving money is so much more important to the miser than the disappointment of missing the booze reward.

The truth of whether this would actually work could be seen in an experiment. I tried to think of one with two rewards that satisfy different desires, and tried to think of a way to slightly disappoint the desire for sugar while strongly rewarding the impulse for money, after the completion of the task. Maybe I should specify that people should be hungry before the task, and tested in the future when they are hungry, to see if they are still willing to complete the task?