This accountability is part of the post-war consensus, enforced by the United States as a world policeman, that granted all states rights to respect for their borders if they obeyed human rights. (Which Russia recently violated, destroying the postwar consensus.)
The proposed charter is a license for the theft of property from high trust western polities by peoples of low trust cultures who are themselves unable to create high trust polities. As such it cannot be considered a ‘right’ but instead a luxury good, or perhaps a license for limited theft.
The rapid abandonment of socialism and communism and the worldwide adoption of capitalism have eliminated the privileged status of Western peoples because of the artificial shortage of labor. Now that this shortage has been eliminated, western cultures no longer have labor advantages, and only have institutional advantages. As such increasing the immigration, power, or privileges of expensive underclasses is no longer affordable.
https://www.quora.com/Why-havent-western-countries-signed-the-International-Convention-on-the-Protection-of-the-Rights-of-All-Migrant-Workers-Members-of-Their-Families