You’re thinking about this the wrong way. These people are on a mission for Mother China. It’s patriotism and loyalty. It’s why militaries everywhere get people signing up for a “glorious death” protecting the assets of billionaires.
Likewise, most soldiers don’t do soldiering for the glory or death, they do it for the money/opportunity.
So they will only protect billionaires? No, that doesn't drive people to make sacrifices. In my opinion it's just about protecting what you love. There are some things worth fighting for even if it means a “glorious death”. Soldiers aren't stupid, I know some. They just can't not take the responsibility. In my eyes they are heroes.