It's not unusual for a U. S. President to issue a call to unleash great numbers of volunteers against social problems.
Most Presidents carefully associate themselves with some volunteer program.
Clinton created the AmeriCorps, Bush poetically extolled his thousand points of light, and Carter's retirement is identified with his Habitat for Humanities work. Three Presidents, Clinton, Bush and Carter, were in attendance. Volunteer activity in the U.S. is already enormous. According to recent statistics, Americans donate 20 billion hours each year to public service. That works out to better than 4 hours a week for each of the reported 93 million volunteers.