On claiming that having a large rally turnout legitimises a cause: that's an argumentum ad populum.
On claiming that what both sides are doing at the moment is populism: no shit, it's an election year, and the unpopular but important stuff happened back in 2005 for a reason.
On conditions not being able to be equated to property: penalty rates = money. Money can be exchanged for property. The same can be done for most other conditions.
On the place of Unions in society: they should exist as organisations with a voluntary membership, and no special legal rights. If an employer doesn't want to negotiate with X union, that should be his right, but he's also narrowing his pool of employees from which he can choose.
Carry on.