Santiago was most likely a deadbeat, scumbag BEFORE joining the military.  
The only crack he slipped through was being recruited in the first place. 
As a veteran, I agree many vets need help for genuine service connected/combat related injuries. However, far too many scumbags, who happen to be vets, are dodging responsibility for their own actions in favor of a well-intentioned pity party.  Far too many are stretching limited resources so those truly in need are being shortchanged.  

==> Fall off a barstool, drunk off your ass and trash your shoulder = service connected disability.
==> Fall of a roof, under enemy fire and trash your shoulder  = service connected disability.  
There needs to be a line.