Yes
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http://encarta.msn.com/dictionary_1861696741/necessary_evil.html Basically, calling something a "necessary evil" is one's way of rationalizing the act of doing something unacceptable/evil by saying that it is necessary. It could also mean something that is absolutely necessary to a country but in a sense it is evil.(truth be told, everything's evil in some sense except for god.)
Subject Perdicate?
4 Syllables
pejises
The greed for the money is the root of all evil.