Bulk Packs

So far, we have 1 (not bulk) for 1gold (100%), 20 for 19gold (95%), 50 for 45gold (90%).
Why not more?
like, 60 for 53gold (88%) (purchase comes as 53gold with 3 bonus when $50 payed)
100 for 85gold (85%)
200 for 160gold (80%)

well, just thought it will let ppl spend more money on packs, which PWE LOVES.