Will "Big Brother" employees' management style always work?

It is not acceptable in the modern management world, I do not like it, I do not like to put a spy everywhere to keep yourself updated.
There are many managerial tools to do that professionally.
Normally this style is exists in family business more than international firms

if a big brother approach isn't working at our own social life,how can we expect it to work in a professional business life where most are looking for personal gains and not team or community gains.

In the professional world, skill, knowledge & experience will come in the first place . The main role of the manager is to utilise these to achieve the goal of the organisation.While attempting to do so, a good leader can use his skills including 'Big brother Approach" to win the hearts of the team. But this has to be excercised clinically, any overdosage can recoil the efforts.

No that is totally unprofessional. 

it should work ...
because successful manager is a leader not a boss ;)

Big Brother approach to bully employees is extremely dangerous for an organisation and is the most undesirable professional approach.
However, Big Brother with extensive knowledge, experience, leadership and managerial qualities and as a team player is happily acceptable by employees as this relationship develops the human resources.

To motivate and Incurging the employees who are already engaged.... and need perfect coordination among them.

Yes

yes,

It may work for a short term but it wouldn't give the desired result for a long term strategy