Why they may not bother studying and solving this problem, recall were on the verge of curing AIDS, eradicating polio and , curing people of cancer and yet we can't solve the age old BO problem.
Well mate economically, they know we will keep buying excessive amounts of chewing gum, toothpaste and deo's plus mouthwashes so why not leave us to it and flood the market with useless products that they know doesn't work. They make profits off my misery, while the government licks its lips at the revenue generated through taxing this fake industry.
It's still a delicate topic, until someone appears on sky news or bbc to complain about this and ask whats been done, take a long nap mate, this is gonna be long.