We are not a very good example of this because we've simply outsourced production. We could not produce goods to scale at the same price point as China, with all our productivity and advances, without trading something else...either an increase in cost of goods or services, which then shifts the poverty line, or an increase in pollution, which is a detriment to health and welfare.
The poverty line is only relevant for the country it is in. Labor-intensive goods would be more expensive if we made them here, but total US manufacturing output is at an all time high while pollution is vastly lower than it was in the past. We are a perfect example of how wealth allows you to increase production while maintaining environmental standards. Now that other countries are becoming wealthier due to free trade they are starting to follow in our footsteps. Look at how China is scrapping coal plants and instead is becoming one of the largest producers of renewable energy in the world. This would have been unthinkable except for the benefits from free trade. It truly is one of those few cases in economics where everyone wins, which is why opposition to free trade is so deeply silly.
Ask those workers if they are willing to trade increased wages for breathable air and drinkable water.
Just so I understand you, you're now conceding that the increase in inequality likely doesn't matter to those who have seen their wages increase from trade? Regardless, China's government has had popular support for years, primarily due to the economic expansion the country has experienced, the backbone of which is free trade.