@Ruben From what I recall, Hughes had to outlaw the #AU Wobblies twice. The first time there was an act of parliament outlawing the #IWW. They responded by changing their name. So then he put through another act outlawing any organisation on a register of troublesome folk, so that every name change didn't require a fresh act of parliament.
Hughes was a self-serving scumbag of the highest (or lowest) order. In order to keep his career afloat, by the time he retired he had opportunistically joined and defected from virtually every political party in the country, with the exception of the Country Party - now named the National Party. Apparently he said you have to draw the line somewhere.
Also #pedantry: It's Industrial Workers of the World, not International. More people get this wrong than right because it is also a strikingly (no pun intended) international organisation. It's an industrial union as opposed to a trade union. That is, you're organised based on the industry you work in rather than the trade you work in.
If an oil company (for instance) has all the members of the clerk's union go out on strike, it can probably limp along for longer than those workers can go without pay. However if _all_ it's unionised workers, regardless of trade, went out on strike…
It's more concerned with class solidarity than old closed-shop guild socialism.
@Matthew Davidson I read 'International' in the book, "The Richest Lode" and thought I must have misremembered. Thanks for setting me right. I'm really enjoying learning about the shenanigans of the unions out here. I cycled along the railway to Cockburn a few weeks ago. It was the border town thousands of Broken Hill unionised workers travelled to just to hear Tom Mann speak after he was exiled from NSW https://en.m.wikipedia.org/wiki/Tom_Mann