Zakaat - Rules and modern issues

Why is absolute possession so necessary?

Humanity and freedom demand that each person should have the right to ownership.  Slaves and animals don’t enjoy this.  A person is distinguished through ownership and through absolute ownership a person can draw benefit from his/her wealth without any hindrance or uses it through his/her deputy or representative.  Now a person is really capable of increasing his/her wealth.  In thankfulness of this great bounty of Almighty Allah, this individual should give Zakaat.  If the possession isn’t absolute or the wealth is of a non-growing nature, then obligating any one to spend from such wealth is not entirely free of distress, although the Shariah removes distress.