F.A. Hayek:
"There is no reason why, in a society which has reached the general level of wealth ours has, the first kind of security should not be guaranteed to all without endangering general freedom; that is: some minimum of food, shelter, and clothing, sufficient to preserve health. Nor is there any reason why the state should not help to organize a comprehensive system of social insurance in providing for those common hazards of life against which few can make adequate provision."

Milton Friedman:
"(My proposal for a negative income tax) has been greeted with considerable (though far from unanimous) enthusiasm on the left and with considerable (though again far from unanimous) hostility on the right. Yet, in my opinion, the negative income tax is more compatible with the philosophy and aims of the proponents of limited government and maximum individual freedom than with the philosophy and aims of the proponents of the welfare state and greater government control of the economy."

It seems there is general agreement across the political spectrum that a government provided, guaranteed minimum income is beneficial and ethical to implement. Why, then, is this topic of almost universal agreement not advanced or actually implemented?