Politicians, Asbestos, and Other Dangerous Things

Why is it possible, for any amount of money in the world, that a politician would make it possible to develop dangerous toxins or to use asbestos in products?

https://www.nytimes.com/2017/12/19/health/lethal-viruses-nih.html?_r=0

https://www.usatoday.com/story/money/nation-now/2018/08/07/back-school-beware-school-supplies/929964002/

I don't understand people who would do such a thing.