Final answer:
Yates and Lansing believed the 1787 Philadelphia Convention should not draft a new plan of national government.
Step-by-step explanation:
Yates and Lansing's complaint can be summarized as their belief that the 1787 Philadelphia Convention should not draft a new plan of national government. They argued against the proposed Constitution, expressing concerns about the powers of the national government and the potential loss of states' rights. They did not believe that the convention had the authority to make such significant changes to the existing government.