The Texas state law that would allow the city to file a lien on your property until you have paid the amount of their assessment is chapter 372 of the local government code.
All it takes for the public improvement district to be authorized is a petition to be signed by:
property owners owning more than 50 percent of the appraised value of the properties to be assessed
If two or three property owners in your neighborhood own the larger and more expensive properties then they could gang up and force the smaller property owners to pay for part of the improvements.
This is not one man, one vote. It is might makes right.
We deserve better