Salaries for cloud engineers

I see 1 post where someone mentioned senior devops eng can get 50-70 lakhs and for 10 year old experienced person 30 lakh is less. As a cloud engineer im surprised how you are getting this much salaries where im having more than 12 years and earning less than 30 lakh. Is tier 1 colleges mandatory for these salaries or anyone from tier 3 colleges are also getting these type of salaries?