Why didn't Sha僧 get the year-end bonus in the Fengshen Conference?

At the deification ceremony, Tang Monk, Monkey King, and Pigsy all became immortals, but Sha僧...

(Note: "Sha僧" is usually translated as "Sandy" in English versions of Journey to the West.)

So the full sentence would more naturally be in English:

"At the deification ceremony, Tang Monk, Monkey King, Pigsy all became immortals, but Sandy..."