Lois, Ask any bishop of any ward how many members of the congregation, members of the specific ward pay tithing. There are members of the Church who do not. They are not kicked out into the street. Many of them hold callings and positions of importance. I'm sure since the economic downturn, it is increasingly difficult for people to pay tithing. But many do out of faith, and , as in my life, feel that we are blessed for it.
Mormons who choose not to pay tithing can still be Mormons.. It is 100% voluntary.