The government shouldn't be able to take your home or land so it can hand it over to another private party. And if the government passes a new law that substantially lowers the value of your property, it should have to compensate you for those losses.
...By requiring the economic costs associated with regulation to be valued, Proposition 90 would facilitate more efficient decision making, as policy makers would be better able to compare the costs and benefits of public action. It would also promote transparency, as the full costs of government action would become visible and explicit."
Thanks to Leonard C. Gilroy, AICP