Why does it say "Chamad Rasha Metzod Ra'im"?
Rashi: He covets to be financed via trapping colleagues, i.e. theft.
R. Yonah: A Rasha covets profit of the robbers, and envies grain of extortionists, who get wealth without toil. There is no benefit from his trapping and wealth; it has no root. A light affliction pushes him off and eradicates him in a moment.
Malbim: A Rasha does not want to toil. Rather, he covets to live via trapping colleagues. He takes their wealth via evil schemes.
What is the significance of "v'Shoresh Tzadikim Yiten"?
Rashi: It gives what is proper to give, i.e. Peros.
R. Yonah: A Rasha strays, for a Tzadik puts a root, and evil does not. Therefore, one should not covet the evil, rather, the ways of Tzadikim - "Al Yikanei Libecha ba'Chata'im Ki Im b'Yir'as Hashem Kol ha'Yom" (23:17). Yiten is [singular, even though Resha'im is plural, like] "Banos Tza'adah" (Bereishis 49:22). An expression of Nesinah applies to the root, like "veha'Aretz Titen Es Yevulah" (Yechezkel 34:27). Every day a Tzadik puts a root, i.e. he rules over every deed that he does, like a tree that constantly sends out roots - "v'Hayah k'Etz Shasul Al Mayim v'Al Yuval Yeshalach Sharashav" (Yirmeyah 17:8). Just like wind does not uproot a tree whose roots are greater than [its foliage], so affliction do not push off a Tzadik or swallow him from his place - "v'Hayah k'Etz Shasul Al Palgei Mayim