A major issue is the definition of the word 'fair'.
If the 'fair' market value of a property is 'X' and the Government offers 'X + 35%' - that could be enough extra compensation for say 30% of those affected. What about the other 70%? If the Government goes and increases it to be 'X + 50%' and that brings the number up another 35%, does that mean that the Government should go back to the first 30% and pay them another 15%? What if we got to the point that there's 10% of those affected left and they are not budging at offers of 'X + 65%' - can the Government then just say that's the final offer and we are expropriating you on this date and the OPP will be there to escort you off the land on that date, would that be ok?
It's impossible to pay the families 'what they want' because some fringe individuals will demand buyouts that are outside the realm of reality.