Most of the jobs need different requirements or special education. A series of different jobs is a career.
Work can provide you with a chance of self-realization, economical and social independence. Also gives you social status, a chance to be inside a work community, have co-workers and achieve your work related goals.
A good worker is motivated by an opportunity to develop in career, achieve more knowledge and experience. The good worker is responsible and knows his craft. And you can motivate a worker with a fair salary and recognicion. That is the only way to improve career and work related achievements.