Contradiction with 2 Corinthians 11:8
This verse indicates that Paul took wages from other churches to serve the Corinthians, which contradicts the idea of not being chargeable to others as mentioned in 2 Thessalonians 3:9.
2 Corinthians 11:8: I robbed other churches, taking wages [of them], to do you service.
Contradiction with 1 Corinthians 9:14
This verse states that the Lord has commanded those who preach the gospel to live by the gospel, which contrasts with the example of not using such power as seen in 2 Thessalonians 3:9.
1 Corinthians 9:14: Even so hath the Lord ordained that they which preach the gospel should live of the gospel.
Contradiction with Matthew 10:10
Jesus instructs His disciples to rely on those they minister to for their needs, conflicting with the example of not being a burden mentioned in 2 Thessalonians 3:9.
Matthew 10:10: Nor scrip for [your] journey, neither two coats, neither shoes, nor yet staves: for the workman is worthy of his meat. [staves: Gr. a staff]