All Praise be to Allaah.
Muslims must realize that the age of living estranged (religiously) in non-Muslim societies effects the proliferation of the haraam and the diminishment of the halaal.
It is very possible what you have suggested is true, since the business sector specifically is more involved in interest than those in the government sector. However, I do not think that this cannot be generalized as a matter of principle in this matter. In general, we can say that it is permissible for the muslim to work in any sector as long as the work there involves halaal activities, and that it is not permissible to work in any occupation or position in any sector which would involve the Muslim in a function that is muharram.
(interpretation of the meaning):
"... And for those who fear Allaah, He (ever) prepares a way out, and He provides for him from (sources) he never could imagine. And if anyone puts his trust in Allaah, sufficient is (Allaah) for him. For Allaah will surely accomplish His purpose; indeed, for all things has Allaah appointed a due proportion". (Surah At-Talaaq, 65:2-3)