Cika wannan jumla: Ba a cika yin la'akari da abubuwan da ke waje ba idan har an taɓa yin la'akari da kimanta sakamako mai yawa. Wannan na iya zama babbar matsala ga kashe kudade na soja. Alal misali, Ƙungiyar Islama ta Iraki da Levant (ISIL) ta dogara ne akan makamai da aka kama. Alal misali, a cikin
Mosul tsakanin 4 da 10 ga Yuni 2014 ƙungiyar tsakanin 500 da 600 sojojin ISIL "sun sami damar kwace makamai masu mahimmanci na rukuni shida, duk Amurka ce ta samar da su" daga wata runduna da ke da ƙarfin takarda na maza 120,000. Idan aka yi la'akari da tasirin da ake samu na kashe kudaden soja, ba a la'akari da mutanen da aka kashe da kuma dukiyar da aka lalata ba. Abubuwan da kawai aka yi la'akari da su shine karuwar tallace-tallace na makamai don maye gurbin wadanda aka sata da kuma farashin da ke tattare da yaki da ISIL. An yi la'akari da su a matsayin haɓaka Gross Domestic Product na Amurka, kuma an ɗauka cewa yana da kyau.