In California, there's a vineyard that pays every worker the same — first hour and last. Jesus told a story like that. It still makes people furious. 

In Matthew 20, a landowner hires workers at dawn. Then at noon. On and on, until 5 o'clock, an hour before quitting time. And he pays every one of them the same. The crew that worked twelve hours in the sun is livid. And here's the uncomfortable part: they're not entirely wrong. Something in this story violates every instinct we have about fairness and effort and getting what we 'deserve'. 

That's not the flaw of the parable. That's the point of it. If you've been working since dawn and quietly keeping score —this one's for you. If you've been standing around all day wondering why nobody has ever come for you —this one is especially for you.