Volunteer work

I think volunteering is needed to all people because it is helpful to both. But I think it isn't good way nation gives volunteer time that is obligated. 'Volunteer' is originated from people's mind. If nation gives same obligated time, it isn't volunteer. In SMWU, we have to do volunteer 10 hours in 1semester. If we don't we can't receive scholarship. What connections between study and volunteer? I can't understand. I know most people volunteer for their obligation time, but it is not efficient way.