In many of the larger churches all the musicians get paid. This is not uncommon in Houston, Dallas, Atlanta, and Orlando. Much of this I contribute to the competition among churches to have the "best" quality of music. The higher the profile a church wants the more they try to accommodate paying better musicians. I think that there are pros and cons to the system. Unfortunately, often musicians move from church to church as hirlings rather than coming into covenant with ministries. Also, many churches do not have a true sense of accountability set up for theses musicians since they are not "members" of the church. You will get many views on this, probably as many as people you ask.
Pastor Forster