Why is Zakat attached to intrinsic goodness even though the needy person’s need is an intermediary?

Quality of the Commanded Act: Intrinsic and Dependent Goodness

• The intermediary’s creation is attributed to Allah rather than the person’s voluntary act
• The intermediary is said to be physically absent and no need is met
• Spending money is sufficient even without the stated relationship to need
• Every intermediary must remain in the dependent-goodness category