Yes you could go with a touch less "endowment" there..
Let me toss you a character creator hint.
use "Torso Bulk" "shoulder" and "waist" sliders a bit more. and reduce breast size a touch and you can work around the clipping with sashes quite nicely. I suspect to eliminate clipping the Dev's will need to rebuild part of the graphics engine. Costume/uniform elements don't collide. means they gotta go through some real hoops when their doing clothing bits. Unfortunatly it doesn't work that way (they should lift some code from second life. Clothing works right in that app. Was build right to begine with and all of the nice clothing is all UGC in second life. I'd call that a hint of a better way to do it)