That looks like exactly what has happened here, the wedge looks to have been filed down on an angle.
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I have used a hacksaw blade with no handle to cut/trim the wedge from the inside without taking it apart. You might have room to do it for now but if it is shrinking it will continue from my experience.
You can only go so far as the pin!;)
I have heard tales of folks who soak scales in neatsfoot oil. I assume that the oil acts like a plasticizer. However, I have not done this, so I do not know exactly what happens. If your scales have shrunk to the point they are problematic, perhaps the neatsfoot oil trick will help. Perhaps someone who has used this method can provide more information as my knowledge is quite limited.
The Neatsfoot oil is for horn scales. It soaks in and revives the horn. It won't work on celluloid. At least to the best of my experience.
The wedge on many vintage razors, if not most, is canted so that the top shows a smaller wedge than does the bottom. Also, the bottom portion of the wedge is often thinner than the top, regardless of the angle of the wedge it'self.
This feature welcomes the blade into the scales and provides strength.
Something the masters did back when.
Shrunken scales such as the Case Red Imps can have the wedge taken back (hacksaw blade draw-saw) And the wedge filed flush until the pin gets involved.
Then, it's over.