Final answer:
Population laws were deemed unnecessary by Mr. Talbot because compulsory education reduced family income, slowing population growth; yet these laws persisted perhaps due to bureaucratic inertia or societal resistance.
Step-by-step explanation:
According to Mr. Talbot, population laws were unnecessary because education laws had already adjusted the dynamic of families by requiring children to attend school, which in turn affected the family's income by removing potential earners. As a consequence, birth rates declined to match death rates, leading to a slowdown in population growth. Nonetheless, these population laws were still being enforced, potentially due to a combination of bureaucratic inertia, resistance to policy change, or other societal factors not directly related to the original intent of the laws.