Dear student,

As per your question it totally depends on which subjects are you interested in to teach others. It's not about which stream you should take to get a salary but you should have that passion for that subject.

Coming to your next part of question, for a dignified salary you can give ugc net for the post of assistant professor or if you took up science and of you are able to teach upto jee level then various coaching institutes are there to hire you with a good package.