Hard wood floors cost more than wall-to-wall carpet, thus your tax assessment is increased.
You failed to see the point and the irony!
It costs more to install the infrastructure and square footage in a house which also reduces or eliminates the need for long term external sources of energy for heating and cooling.
By assuming, wrongly, that there is some kind of right for government to take more money from people with a larger and perhaps more expensive to construct home, you also deter the development of housing that is heated and cooled by the passive Solar energy collected in such a larger home. Indeed, such a government can and does tax a family out of such a larger home that was built at a fraction of the cost of a home less than half the size of the larger rhome.