Israel had a tribe dedicated to serving God in the temple. The Levites were not allocated any land, so they were supported by the other tribes. As commented by Anne below, "They received their living from income given to the temple, and in accordance with O.T. laws about priests. Also, a group of women ministered to the material needs of Christ and the disciples - Luke 8:1-3." There is therefore a biblical precedent for supporting those who are appointed to serve God and His people.
With regard to Christianity, at the outset there was no “organised religion”, just the disciples of Jesus who left everything behind to follow Jesus. They were all equal, and they shared everything they had. It’s worth remembering that “God so loved the world he failed to send a committee,” let alone bishops or priests.
The disciples spread the good news of the gospel by walking from village to village. Where they were welcomed, they accepted hospitality from the villagers who put them up and fed them. The disciples would stay there for some days, preparing the way for Jesus, and so the message spread, slowly.
After the death and resurrection of our Lord and Saviour, and the outpouring of the Holy Spirit on the disciples in that upper room in Jerusalem at Pentecost, Christianity exploded into the civilised world. Things changed. House churches were formed. Peter, Paul and all the other disciples travelled extensively. They received hospitality from like-minded believers. Paul is a good example of a disciple who refused to be a financial burden on those early Christians. He joyfully “lowered himself” to spread the gospel “free of charge”.
Unlike so many, we do not peddle the word of God for profit (2 Corinthians 2:17)
Those first century disciples earned their keep, whenever possible. Paul, a tentmaker by trade, met fellow tentmakers Priscilla and Aquila, and
because he was a tentmaker as they were, he stayed and worked with them. Every Sabbath he reasoned in the synagogue, trying to persuade Jews and Greeks (Acts 18:3–4).
Here we have the first-century example of disciples who selflessly gave up any creature-comforts they may have previously enjoyed in order to obey the commission to spread the gospel throughout the inhabited world. Be assured, since then there have been many disciples who have followed that example, enduring hardship and relying on the hospitality of others.
Don’t forget, though, that Jesus said the workman is worthy of his wages. Also, instead of travelling the globe on foot, or on the back of a mule or a camel, things have moved along. However, the principle, given by Jesus that we are to rely on God for our needs, still applies:
Freely you have received, freely give (Matthew 10:8)
That does not mean to say someone who devotes their entire life to serving Christ and taking care of the flock must become homeless and beg for food. The example among the first Christians was one of helping each other and sending financial support, where necessary, to their brothers and sisters in Christ who were suffering. Take, as an example, the Jewish Christians in Jerusalem. Fellow believers contributed financially to help them as they struggled because of persecution. As the church grew, a pattern developed:
All the believers were together and had everything in common. Selling their possessions and goods, they gave to anyone as they had need (Acts 2:45).
How about today? The same principles apply. Christians support one another, and that includes financial assistance to those who have abandoned careers in order to devote themselves full-time to looking after the flock and spreading the good news of the kingdom to others.
If a Christian community wants the benefit of a full-time teacher and preacher, then they should be prepared to provide financial support in order to make that possible. A stipend is what such ministers can expect – just enough to keep a roof over their heads and to feed their families.
I do not speak of religions that put their bishops in palaces and bedeck them with gold cloth and jewels, and that includes the Churches of England and of Scotland. I speak of modest congregations of believers who are not subjected to the governance and structures of religions that promote obscene wealth and elevate men to positions of power and authority over millions of people.