> This seems to be a rare case where removing words adds information
Words aren't being removed, but the word because is being added to a very old speech pattern.
"The talks failed because politics" is an expansion of "The talks failed: politics", with a pause between failed and politics, and politics spoken like a new one-word sentence, usually at a slightly different pitch level than The talks failed. It's meaning and intonation pattern is quite different to "The talks failed because of politics".
When saying "The talks failed because politics" out loud, we still put a pause before politics, and use the same intonation pattern as "The talks failed: politics". The word because replaces the terser colon in the written form.
It could also be interpreted as a short form of: "The talks failed because politics happened". Now we're just dropping the obvious verb at the end, because obvious is obvious.
Words aren't being removed, but the word because is being added to a very old speech pattern.
"The talks failed because politics" is an expansion of "The talks failed: politics", with a pause between failed and politics, and politics spoken like a new one-word sentence, usually at a slightly different pitch level than The talks failed. It's meaning and intonation pattern is quite different to "The talks failed because of politics".
When saying "The talks failed because politics" out loud, we still put a pause before politics, and use the same intonation pattern as "The talks failed: politics". The word because replaces the terser colon in the written form.