If the income such as salary may be below, especially if you can take charge of a certain piece.
After all, there are many positions in the Ministry, but few positions can be managed specifically. If you work in a Ministry, it is not a big problem to mix a high level, but it is more difficult to mix a director. If you don't take care of the facts, it is unrealistic to have a lot of income.
The following words are not easy to improve, but it is relatively easy to take charge of a certain piece, so your extra-salary income will be more.
Measure it yourself.