@Klue As you mentioned, those are generally the ways directors can get cash from the business. They should get reported prior to happening and be voted upon by shareholders. Loans follow ATO legislation i.e interest rates etc. Purchases should be valued etc. Company credit cards can only be used for company expenses.
Another interesting one is contracts with metrics which is very popular with large caps. You want business to hit x target pay me, good example is Boeing and plane safety/quality.