Does this mean to say that once the Steward has been 'chosen', they're secure in the position for life? Because - if I recall correctly - Welat is increasingly unpopular with the local populace.
Would it be possible (in a wider historical view of Ashur) for a Crown to use negative public sentiment as a pretext to give a Steward / figure of similar standing the boot without taking the risk of being considered tyrannical?
With that plus Welat's... less-than-favourable position in the court of public opinion and the Crown currently enjoying this desperate awe/reverence from the people in mind, would it stand to reason that he probably can't get away with making an enemy of a more savvy monarch?