It depends on how they meet their survival needs, they can be very wealthy or penniless. Some make a living as mystics and sages: spiritual teachers, healers, authors, yoga instructors, lecturers and such. On the other end you have the monks and hermits, in some places you can simply join a monastery and devote your life to spirituality. For the most part though you will find a balance between survival and spirituality, not a full time sage or mystic as you say, and not a wage slave either. The advantage for survival is that when you see beyond the veil of materialism things are not so rigid, and you ultimately have nothing to fear or worry about. Don't get hung up on sharing insights like Leo does, there are plenty of teachers already, hundreds-thousands of actually very useful books and videos to learn about spirituality from, and more coming, but their words are no substitute for direct experience.