Do you want to go back to working 16 - 18 hours a day for minimum wage and no benefits?
Foxconn and apple is a good example of why people need unions. Companies turn billions of dollars in profits, pay employees a few hundred dollars a month.
I think you are confusing labor laws and unions.
They are very different concepts.
Lax labor laws == labor arbitrage. Unions don't fix that.
People in no way need a union to fix what is going on at Foxconn, just get rid of the labor arbitrage that anyone is able to use in China. Laws on maximum number of hours worked, a higher minimum wage, minimum working conditions, etc. In a country of 1.2B, there are simply too many people willing to work for a union to change that. Only the government is able to sort out situations like Foxconn and the Chinese government as of now is not willing to.