As many have already stated over the thread - peace is defined by an individual. I for one was earning around 7 some 2 years ago. I was content for quite some time - 5 years when my salary barely moved or there was zero onsite. Then there was a phase - new team, new project and god the people I had to bear with. After struggling to find a job in my niche skill, I searched for a profile. Something I presumed would help me work with "good" people. Colleagues who don't play football with work and instead took responsibility. A manager who at least bare minimum listened when people spoke, not think his JD was to "assign" work to associates without taking in account people's feedback.
I somehow managed to change the profile and company, who projected them as "intelligent". Turned out colleagues are now at the extreme opposite end ie they take too much responsibility, handling stuff they shouldn't be putting their hands into. And even taking calls at 2-3am in the morning, even when I tell them to draw a line where our team responsibility ends.
Now my ctc is nearly 20, I work barely 32 hrs, but then I feel general "lack of peace" just because of the people I am dealing with on a day to day basis.