Finastra Java TP3 interview questions

I had very bad experience. First I gave all my details including expectation. They took 3 round of interviews. I was asked to provide the documents. Then finally they offered me the Salary which was : X/1.5 of what I have asked which comes up to my current CTC. Why would someone leave the existing company for just a little hike. If you don't have the budget, why to waste the time of intervewer and candidate?