Cale during the Indignity Test, by design, was the embodiment of the cornerstone quote from the 2005 movie Nanny McPhee:
"There is something you should understand about the way I work. When you need me but do not want me, then I must stay. When you want me but no longer need me, then I have to go. It's rather sad, really, but there it is."
For both Dodam and Alberu, Cale appears as someone they instantly reject.
The Terrible Bastard for Dodam was immediately a representation of three years of pain and despair. Dodam did NOT want him, but he needed his salvation and ended up intrigued enough to kidnap him.
The clueless servant for Alberu, who I believe goes unnamed, was immediately a representation of Alberu's fallen status, the lack of regard others held for him, that he would be sent someone who at first glance seemed so utterly useless. Alberu did NOT want him, but he needed someone so 'clueless' that he could turn the first prince's palace upside down.
Once Cale finished with Dodam by providing for all of his needs, from material, to social, to psychological, he was truly wanted, but by nature, not needed.
Once Cale finished with Alberu by changing his material circumstances and fanning the spark in his eyes so that it became a blaze, he was truly wanted, but by nature, not needed.
Now, I've gone into detail here even though this is quite literally just the way the rules of the Indignity Test work because I want to set the foundation (although not complete the construction) for the following statements:
While this is not always the case, I think Cale's mindset and expressed preference is to do exactly this. He wants to provide what is needed for others to be fully capable of living without him, and then he wants to move on. However, he often doesn't expected the wanted part of wanted but not needed to grab him by the ankle and drag him back.