It is just not fair. They hired a consultant a while ago, and now they just dropped his figure. Before imposing an impact fee, they should really look at those numbers again. This has been true of governments the world around. In democracies the character of taxes says a lot about the character of the society.
Taxes reveal either the character the society has, or the character it wants to have.
That's a foreword to comments below on LH's proposals and others. The idea begins as a user fee, let people take responsibility for the burdens they place on society rather than asking others to pay the costs. As with most requests that people accept responsibility, this one is immediately reshaped beyond recognition by exceptions. LH proposes that lower income people be exempted. The Robin Hood Impact Fee has two problems.