Scripture tell us that the laborer is worth a reasonable wage.
And in the same house remain, eating and drinking such things as they give: for the labourer is worthy of his hire. Go not from house to house. (Luke 10:7 KJV)
Woe unto him that buildeth his house by unrighteousness, and his chambers by wrong; that useth his neighbour’s service without wages, and giveth him not for his work; (Jeremiah 22:13 KJV)
And I will come near to you to judgment; and I will be a swift witness against the sorcerers, and against the adulterers, and against false swearers, and against those that oppress the hireling in his wages, the widow, and the fatherless, and that turn aside the stranger from his right, and fear not me, saith the LORD of hosts. (Malachi 3:5 KJV)
For even in Thessalonica you sent aid once and again for my necessities. (Philippians 4:16 NKJV)