[Dalewyn]

Regardless of whether Congress or the States pedantically write new amendments, they must be ratified by 3/4ths of all States in the Union. Ergo, the States ultimately write what goes into the Constitution, and the States answer to their Peoples respectively.

The Constitution itself was also ratified by 9 of 13 States to start.

Congress and thus the Federal government cannot modify the Constitution by themselves, they serve at the pleasure of the States.