Now that I have your attention...
I'm getting very wary of arguments that run like this:
"Hey man, we're not medieval, we're protestants, there's no secular / sacred divide. Therefore it's not that everyone should join Navigators - they can join Goldman Sachs, it's all equally cool. Cos, hey, Genesis, the Lord is a worker and gets His hands dirty and Adam was made as a worker. There's a divine dignity to all work, don't try to put full time gospel ministry on a pedestal. Everything's equal now."
There are parts of that argument to which I want to give a hearty Amen. But...
It's interesting that Gen 2:15 might be more literally translated:
"The LORD God took the man and RESTED him in the Garden of Eden to SERVE and WATCH" Or even you could say "to WORSHIP and KEEP."
All this has heavy temple/priestly connotations - just as the temple has lots of Eden connotations.
And of course when the true Man stands on the earth He describes His work (and that of the Father) in priestly (ie evangelistic terms) - e.g. John 4:23,34-38; 5:21-29). And the kind of 'till the earth' stuff that Jesus does is, well, priestly (ie evangelistic) - e.g. Matt 9:35-38; Matt 13:1-53)
Now we together are a priesthood in Him declaring the praises of the Father that pagans may glorify God (1 Pet 2:9-12). That's true priestliness - bringing people to God in the Priest - the Lord Jesus.
And that's the real redemption of our labours - whether labours for Navigators or Goldman Sachs (both need redeeming). We are to sow gospel seeds on whatever soils we find ourselves as priests in The Priest. Whatever else is involved in the redemption of our labours - that has to be a key part.
And absolutely you don't have to be ordained or "a full time gospel worker" (whatever that phrase means) to do that. You might very well be ordained etc and not doing that.
But I just don't believe that Mr lonely lighthouse keeper is really glorifying God by sitting alone on an island but working really hard "as unto the Lord"! The redemption of work that comes in the Redeemer will mean not simply being an honest accountant (or whatever) but by being a priestly accountant. And so not all jobs are on a level.
We're used to saying "If you can't be moral in your job, it's not a job for Christians." But I think we should be equally ready to say "If you can't be priestly in your job, it's not a job for Christians."
But demolishing the medieval divide is not accomplished by denying priestliness to people. It happens by affirming the priestliness (i.e. the evangelistic character) of all activities.