Your link is a slideshow that has nothing to do with the claim you make (not that it's much of a claim -- 25 cents in what era and compared to what wages? 16 hours -- lots of people still work such hours, so what?)
Re: the linked slideshow (which is not an argument), Tom Woods has addressed the "child labor" issue many times. You can disagree with his analysis, of course, but you ought to be aware of and consider it.
(Most relevant snip: http://www.tomwoods.com/blog/beware-the-free-market-exploita...)
Bottom line -- unions are good at spouting emotional slogans and bullying/intimidating anyone who questions their claims, but really, what's the evidence that a gang of thugs somehow improved people's standard of living? It was thugs, not rising productivity, that did this? If so, why can't the government make us rich?
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