Why do gardeners often build compost heaps on a pile of loose fitting sticks or bricks?

Circulation, drainage, ease, security and support are reasons why gardeners build compost heaps on a pile of loose-fitting bricks or sticks. The raised level makes it easier for gardeners to add to or to turn or water compost piles and more difficult for foraging wildlife to access compost heap contents. It permits drainage of excess liquids, rainfall and waterings and provides structure and support for the unconfined, unsheltered pile.