here are a few...
1. Australia have always been net capital importers, and thus our BOGS is always negative making our CAD always negative. (ie we import more than we export)
2. Because Australia's CAD has always been high, we've almost fallen into the debt trap scenario, where we're borrowing more money from overseas to fund our current CAD. This causes an even higher CAD...and this ccycle just keeps continuing until our CAD blows out.
3. We have also always attracted more foreign savings and investment thatn we have sent overseas, making our KAFA account in surplus. This must be funded by paying interest which gets recorded in the current account, causing income component of Current account to be in deficit --> high CAD
4. Australia has traditionally been an agricultural exporter, and agricultural prices tend to fluctuate excessively in the short term. This makes our BOGS highly volatile, and because ag. prices tend to be usually lower, our BOGS is almost always negative, causing our current account ot be in deficit
these are the main ones...one of the more minor ones may be concerning the AUD...bu tyeah these are the main ones