What would you judge, (and broad-stroking this is acceptable, since who knows what the cost of living is in another part of the country, or world to not broad-stroke it), someone like John Pipper, R.C. Sproul, Billy Graham, Liam Goligher, (sorry, only one I can think of from your part of the world, even though I have no idea when he left the UK lol), or even -- dare I say it -- Joseph Prince be worth salary wise? The commonality I'm going with was they are/were all either big-draw names, or pastors of big churches. (And, sorry, but Liam is still the only British name I could think of, but his current church has 1700 members. And the only reason it doesn't keep growing is because when it does, then they plant a church in a neighborhood, and many of the members leave to join that church.)
And, I have belong to a church too small to afford a pastor, but we paid four teaching elders $300 for their sermons, (giving each one weekend a month), because we know preparing for the sermon takes 30-35 hours of study, and all four had fulltime jobs. The pastoral care was something we all worked on together in one way or another, (including those four teaching elders volunteering and a few other teaching elders coming in to help with building maintenance), with our two ruling elders in charge of the basics of the church itself.
It really is hard to figure this out, since we often go with "if they're serving the Lord, they shouldn't expect to be paid," as too often a Christian phrase for, "I might get this for free."