Mental issues - Why are people having so many problems these days?

I filmed a video when a woman had an "episode" in Parliament Square, Central London, outside the building where our MPs meet.
Her boyfriend, being quite aggressive, approached the security guard next to Sir Winston Churchill's statue. He did nothing positive to calm the situation down or help her.
What do you think is causing all these problems?
I don't think the woman was on drugs, just mentally unbalanced.
What do you think?