I actually thought that this was a real position, if you made straw boss on the White Raven Ranch you got the chair next to the boss. That was the hottest seat in the house most of us kids would go to town to be the straw boss.
It was a few years later when I learned that the straw boss was about as worthless and low ranking as you could be. Equivalent to a Green Horn.
Regardless though I enjoyed my time as king of the straw boss