N.Y. Municipal Housing Authority Law § 61
It is hereby declared that in certain areas of counties, cities and first class villages of the state there exist unsanitary or substandard housing conditions owing to over-crowding and concentration of population, improper planning, excessive land coverage, lack of proper light, air and space, unsanitary design and arrangement, or lack of proper sanitary facilities; that there is not an adequate supply of decent, safe, and sanitary dwelling accommodations for persons of low income; that these conditions cause an increase and spread of disease and crime and constitute a menace to the health, safety, morals, welfare, and comfort of the citizens of the state, and impair economic values; that these conditions cannot be remedied by the ordinary operation of private enterprise; that the clearance, replanning, and reconstruction of the areas in which unsanitary or substandard housing conditions exist and the providing of decent, safe, and sanitary dwelling accommodations in said areas and elsewhere for persons of low income are public uses and purposes for which public money may be spent and private property acquired; and the necessity in the public interest for the provisions hereinafter enacted is hereby declared as a matter of legislative determination.
N.Y. Municipal Housing Authority Law § 61