Passage for Reading 4

Which sentence given below is the most powerful in terms of belief?

If I get a job in an International company, I will go places.

If I started a business, I would earn a lot of money.

If I had got a job in government service I would have become very happy.

Now in these sentence types using the three IFs, the first sentence is spoken by a very confident person having a very strong belief, the second by a not very confident person having a weak belief and the third by somebody who is living in the past.
So by changing the IF pattern in a sentence, can we enhance our confidence and belief in a particular outcome?  The answer is clear from the above example.