^^^: Some explanations for Victoria 1's system:
1. Dead / crippled soldier isn't in soldier business anymore, nor does his family provide any soldiers.
2. Dead / crippled soldier cannot support his family and just disappear for simplicity's sake.
I honestly doubt there was anywhere near 100% fatality rate among war orphans and widows. Besides, don't we have war exhaustion to represent the civilian hardships already.
If we are going for simplicity, I'd rather have young lads that just happened to be looking up to a life in their respective nations colours than have 36.000 only partially related people snuff it because a division was encircled during a punitive expedition to Mexico.