9"The workers who were hired about the eleventh hour came and each received a denarius.
10So when those came who were hired first, they expected to receive more. But each one of them also received a denarius.
11When they received it, they began to grumble against the landowner.
12'These men who were hired last worked only one hour,' they said, 'and you have made them equal to us who have borne the burden of the work and the heat of the day.'
13"But he answered one of them, 'Friend, I am not being unfair to you. Didn't you agree to work for a denarius? 14Take your pay and go. I want to give the man who was hired last the same as I gave you. 15Don't I have the right to do what I want with my own money? Or are you envious because I am generous?'
16"So the last will be first, and the first will be last."
Point one: It is far more, even infinitely more important how we finish our "race" here on earth than how we started it. This is not to speak of making a decision to "work in the vineyards" and changing your mind later, that's covered under a different parable. This parable speaks to those to whom we Christians consider lost causes, despicable humans of the worst sort, but to whom God looks at and simply says "that's because they're not working for me yet" and hires them at the same wage. This brings us to point two.
Point two: It's not fair! This comes up A LOT in the Bible, which is funny because it still comes up today, even as it is dealt with over and over again. Here again we have humans complaining it's not fair. It is fair, it is eminently fair for necessarily one reason alone, and that's It's His Money. It's God's to do with what He will. How you would spend God's money doesn't even factor into the equation. It's just not yours to spend. I can hazard a guess using my corruptible sense of fairness, which obviously falls short of God's. I could say that we are not being paid for the time worked in the Vineyard because time is relative and is a poor measure of infinite qualities such as God has. Rather, we are paid by the only thing that stands the test of time, which is our decision to work at all, before we leave this mortal coil.
Point three: God's "money" belongs to God, and a person's money belongs to a person, to do what they will with. As a Christian, I have made my choice that my "money" (material and spiritual) belongs to God, in fact have decided that it was His all along. But I will respect the choice of others to do with their money what they will, even when I think "it's not fair." After all, their money is passing, while God's currency is eternal. If they don't want to take advantage of the best currency market of all time, it's their loss. But I also want to keep trying to hire them into God's Vineyard, and I'm going to tell them the wage will be the same as mine, though I have been here longer (which really just means I'm aware of more of my sins, so, actually feeling less qualified!).