You are assuming the answer. (The old phrase for this was "begging the question"). Someone could easily ask "Why don't the landlords, who get all that money from rent, spend it on something, and thus drive growth?" And you can easily answer that: the wealthy spend less of their income, they save more, therefore the high profits from rent increase the savings glut, etc, etc, etc.
But you should state the answer directly rather than assuming it under a layer of indirection.
But you should state the answer directly rather than assuming it under a layer of indirection.