I wouldn't want to assume of any such collusion between major pharmaceutical companies and cosmetic companies. There's no such evidence leading to a strong conclusion of this nature.
However, many conspiracy theories have been rumored about such a collusion between this two giant industries.
Have you heard the one about white people, who are the so called inventor of HIV/AIDS in an attempt to wipe out African and under development nations? It sounds crazy if you ask me. I just can't get my head around such since the said deadly disease is very much present in their own countries and taking lives on a daily basis.
On the other hand, some of these rumors can not be overlooked. History and past judicial cases has shown us instances where certain people in some weapon base businesses start out wars between two parties by framing both parties. This way, they make money for as long as the war last. I think this is the main reason why we hear of unconfirmed stories of this nature related to killer disease and pharmaceuticals.