The wearing of uniforms on off days is a breach of the employee code of conduct, and may lead to dismissal, especially if you are a trouble maker.
The Melbourne meeting may as well be a polling booth where guys bid for their commands by nominating the salary they want, this way the company can save more money .
Dont forget security will trawl the staff carpark to look for people parking on their days off.
IF YOU DONT LIKE IT LEAVE. Its not winnable !