Those describe downward pressure on income, not wealth necessarily:

None of these would lead to a decrease in wealth so quickly, except for situations in which the wealth had to be consumed to make up for loss of job / disability / sickness / overconsumption.

Re: Military families: Most people getting killed/dismembered were too young to have any wealth to lose. Even still, their wealth would actually increase upon death as the military's life insurance policies are quite generous.