> Technology should enhance quality of
  > life of people. when it replaces people,
  > chaos ensue !

This doesn't make much sense.

There's no 'should' with technology - it's merely a (set of) thing(s).

Replacing people, in the sense of doing away with Bullshit Jobs <tm> is entirely the goal of new technology - so that those people can do something else. Ideally that something else is something they want to do (and that may (but not necessarily does) improve the world).

I think your prediction that people will be replaced by technology is a little naive.

The idea that the pointless activities of some people will be replaced by the vague category of 'technology' is entirely palatable to most people.