The Buddhist perspective seems to be that we suffer from a
general addiction ("craving").
Meditation is supposed to shine a light on that. Since few people ever just sit down without entertainment or work, the meditation posture becomes a way to notice (and subdue) one's constant tendency to reach for something to enjoy or accomplish.
This craving comes as part of "attachment", the way our minds are hooked up into all kinds of duties, relations, plans, hopes, fears, etc. Mental life is like swinging from branch to branch in a jungle of obligations, desires, aversions, gossip, anxieties...
In modern parlance it's the phenomenon that makes us feel constantly stressed about all kinds of stuff, in the most general sense, up to and including the end game vision that one day we're going to die, so we better get to work.
Every time I check something off my todo list, two more things appear...
Without buying into Buddhist metaphysics, I do think it points out something that's extremely palpable in these days, thus the recent (fading?) trending interest in meditation and mindfulness.
Another lucid perspective on it is McLuhan's, like in a brief essay called "The Agenbite of Outwit."
http://projects.chass.utoronto.ca/mcluhan-studies/v1_iss2/1_...
With the telegraph Western man began a process of putting his nerves outside his body. Previous technologies had been extensions of physical organs: the wheel is a putting-outside-ourselves of the feet; the city wall is a collective outering of the skin. But electronic media are, instead, extensions of the central nervous system, an inclusive and simultaneous field. Since the telegraph we have extended the brains and nerves of man around the globe. As a result, the electronic age endures a total uneasiness, as of a man wearing his skull inside and his brain outside. We have become peculiarly vulnerable. The year of the establishment of the commercial telegraph in America, 1844, was also the year Kierkegaard published The Concept of Dread.
Mental health in the age of the internet indeed seems like a major topic.