1. Trust hasn't been eroded (i.e. fraudsters/salesmen do not predominate)
2. There is an external stimuli towards making friends (i.e. socializing is being perceived as a good thing)
3. There is an internal stimuli towards making friends (i.e. disregarding #2 and all other personal needs met, one still feels the need to connect with others)
The fact that you've got the results you mention here shows that you live in a community with mentally healthy, although isolated, individuals. You'll find drastically different results in other parts of the world (third-world, for instance). Plenty of people wouldn't talk to you if they see no financial benefit in doing it (even a measly amount can have a profound effect). I used to make fun of this but it's not an easy thing to swallow and can get you quite depressed.
The "loneliness epidemic" is just a reflection of the eroded values and misplaced goals that are now commonplace around the world.