In the first place, Arai's plan was developed based on the intention to implement trade controls originating from Confusion commerce suppression policy, so limiting the amount of trade simply followed the system developed in the Tsunayoshi era and his plan intentionally ignored the truth that the outflow of gold and silver had already stopped by Tsunayoshi's reform.
貿易額の制限そのものは綱吉時代の踏襲に過ぎず、更に新井の意見書には綱吉時代の改革で金銀の海外流出はほとんどなくなっていた事実を意図的に無視するなど、儒教的な抑商思想に由来する貿易統制ありきの発想が存在する。