At the cost of seeing people take advantage of the opportunity to add value for their customers.
> This is a pretty extreme example, but that's what it comes down to
It's not what it comes down to. Someone in the market for the cheapest smartphone possible won't buy a $10 phone even though it's cheaper than the next alternative, because quality also matters. Or at least, value for money matters.
> Thanks to the free market, there's always going to be someone willing to do it for cheaper while sacrificing product quality
Someone might be willing to offer something cheaper, but thanks to the free market, that option will only be popular if people believe it's good value for money and buy it.
> employee welfare
This is mostly a competition issue. If it's too expensive to create employers, there's no competition for workers.
> or environmental impact
This happens in all types of agreements. The limiter on non-free market countries for environmental impact isn't ethics, it's inefficiency. Only regulations can solve this.