if FMG and AGO had spent more time shoring up their companies...

if FMG and AGO had spent more time shoring up their companies rather than sucking up to LNP politicians they would not be in this mess.

FMG in a mess? What do you mean? Making a profit and no debt repayment required until 2017, and then probably renegotiated, - possibly at lower rates? That's a mess?

We all really need the AUD at 50c to help our Economy

In theory that's unarguable. But in practice when the dollar drops the economy seems to go with it.
Be careful what you wish for. If the dollar dropped to 50 cents, the price of imports, fuel, cars, electronics, would skyrocket. And seeing as we import just about everything, I'm not wishing for a fifty cent dollar.