The government could just let their families feed them, further reducing the burden on the taxpayer...
Ultimately you just have to say “Tough Sh!t, Hajji!” If a Westerner breaks the law in the Middle East, they don’t get special treatment. Why bother to reciprocate?
Personally...I’d like to go to the $1.50 option per day...and just feed these guys cabbage, carrots and macaroni. I wouldn’t waste beef or chicken on them...except maybe Sunday’s meal. There is not a single reason to provide coffee, tea, milk or any expensive meat to prisoners.