Bowser himself doesn't care if his troops have to die because they respawn, therefore he thinks it's fair to sacrifice them time and time again. Despite all this, the army are still too stupid to understand that they could turn on him any moment, so remain loyal. It is known throughout the UnWorld that Bowser's army is weak by comparison to the Teletubbies army or the black army seeing as all that is needed to vanquish them is one red Italian plumber who surprisingly does no plumbing whatsoever.