For the Scripture says, "You shall not muzzle the ox when it treads out the grain." And, "The laborer is worthy of his wages."
A third possibility is that the honor was pay, and the double honor was double pay. [Note: Litfin, p. 744. Cf. Guthrie, p. 105.] As far as I know, no one has proved that elders in the early church typically received pay for their ministry.