They are criminals, so why should my taxes pay for their medical treatment?

“They are criminals, so why should my taxes pay for their medical treatment?”… 3 questions surrounding ‘the elderly and prisons’ [Investigative Report - The Elderly and Prisons]
Q1. “They are criminals, so why are we providing medical treatment with my taxes?”
Q2. “The victims suffer for a lifetime, so why are we worrying about the perpetrators' retirement?”
Q3. Once their sentence is over, shouldn't they fend for themselves?
On the 30th of last month, in a medical clinic at Anyang Prison in Gyeonggi Province, Jang Cheol-su (pseudonym, 72) was disinfecting his feet, which are suffering from diabetic foot ulcers. To the left of Mr. Jang, a patient with pneumonia lies in a hospital bed.
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