Originally Posted by Karoo

Actually 4k gold is quite a barrier to most people who might want the gear. Otherwise everyone would just be spending ~600g a week for 1200 arena points. (I understand some servers would see a much larger price tag on that many arena points)

At that rate 4k gold would get you ~7500 arena points. And in the process your rating would be over 2k as well. And, especially for a more casual player 600g a week seems a much less daunting task than a frontloaded 4k gold