The pay should depend on the financial situation of the church. I was full time worship pastor/minister of music at a church for 5 years. In the beginning, I didn't get paid at all. It was a year later - after we worked hard to grow the church, that I was hired full time at $ 250 a week. As the church grew, my salary increased. When I resigned this year after 5 years, I was making $500 a week. And I earned every penny of it. I was required to work in the office 40 hours a week. However, I was not a hireling. I actually was a part of building that ministry. So, I earned my pay. There is nothing wrong with getting paid to be a lead worshipper. Actually it would shock many of you to know I got paid that much and at that time I could not play the keyboard. I lead worship and built a band, front line, and choir. We did not pay the band or vocals. But, I also pastored those in my department. So, I did a lot more than sing.
I left there to start another church. I enjoy building ministries. I do not get paid at this ministry. But I will do the same thing I did at the other church and work myself into a job. As we build the ministry, God will bless me. Money follows ministry, ministry does not follow money!!