Everybody wears camis to cover cleavage in low v-necks. Does the same technique work with low scoop necks? How to make it not too contrived, particularly when the scoop neck is white?

The reason I'm asking is because my cobalt IO dress, along with the IO ruched tanks that I recently broke down and bought are so low cut. The arm holes are perfect so to have a tailor raise the neckline would also require changing the arm holes which my tailor says is $40 each. Ouch.