72 - Blight in Missouri?

I found the following link in the Missouri state statutes referenced frequently in City of St. Louis aldermanic bills:

(3) "Blighted area", an area which, by reason of the predominance of defective or inadequate street layout, insanitary or unsafe conditions, deterioration of site improvements, improper subdivision or obsolete platting, or the existence of conditions which endanger life or property by fire and other causes, or any combination of such factors, retards the provision of housing accommodations or constitutes an economic or social liability or a menace to the public health, safety, morals, or welfare in its present condition and use;

Economic or social liability? How vague is that? We can see that any property that any political entity wants to take for whatever reason can happen.

Link - Blighted area