Any document you send needs to be CATEGORIZED and scanned and put in the system, even the envelop that you post your documents. If you make GCMS request and ask for all relevant doc, they send you everything. So, when an officer open you envelop and see to many unnecessary docs you will be put on hold and he will work and another application. They don’t slow down their process.
The processing junior officer is not the one who makes decision on your file so it will be useless to send anything that is not asked for.
And you know all this how?