Does it all even out in the end?

SO...I have been sitting here wondering about this today. Is it true that everyone gets what's coming to them? Is there a karmic balance sheet? If so, I think I gotta be due some good stuff but enough about that.
As I have been staring a spreadsheets and lamenting my life (why is a lawyer doing property taxes again?) I have been wondering if all that advice about making lists of pros and cons/pluses and minuses actually works. How do you quantify the nebulous? How to rate someone's muchness? If all the minuses are small but beginning to mount but the pluses are nebulous and hard to cound, is this a valid measure? Can all of a person be assessed as cells in a spreadsheet?

All of this nonsense is making me long for the days of grey, of the crazy hypothetical where there is no 'right' answer. I am living in a world of too much black and white/right and wrong etc. Where's the middle ground? Where does it balance out?