Does it make sense..

Does it make sense we write in our SOP that we want to come back to our country, we want to think about growth, we want to think about political economy of oil and so on?
1. I prefer to do not write this kind of domestic economic interest, I personally prefer to think more globally and think more about frontier but
2. These kinds of reasons are not at all harassing, I mean professors here understand them but if you write them in informal fashion, no one buy them. You could propose your idea in professional manner and not talk like an socialists. Be economics in your SOP.
3. Univs read SOP if they hesitate to give you fund/admission or not, thus I strongly recommend to write some thing be related to professors in the your target univ. For example
Talk about political economy, Natural curse if you apply in LSE
Talk about Inequality, Dynamic Macro, Auction in Oil and Gas industry if you apply for UT
Talk about Electricity and LNG, auction, regulation if you apply stanford
Talk about growth, public policy and .. if apply MIT
....


Does it make sense if we mention our perfect job in engineering?
Do not insist on them, they only show that you are a serious student, but do not forget you apply for economics. The same causality work when you ask from engineering prof. to write recommendation for you. But Math is completely different. Focus on your skill if you have some specific research or TA ... in mathematics.

Does it make sense to request from my manager to write recom for me?
depends on what he wants to write for you. If your work is not related to economics this recommendation destroy your situation. But if you have done some economic research in your job it could be interesting.

Does it make sense I send a research proposal or abstract of thesis?
absolutely. It could help you so much.

continue..