Why is Moshiach descending from King David? Why not Levites or Cohanim? And more questions on the tribes..?

Question

Are the Cohanim blessed more by God than the other tribes? Were they ever believed to have special powers? Why do they deserve to eat the sacrifices more than any other people?

Also are modern day Cohanim prepared for the time the Temple is rebuilt and they have to retake their place as Priests?

Answer 1

Eleven tribes were all given land as inheritances in Israel. The Tribe of Levi did not get land for inheritance. The bulk of the Levi'im were the administrators, scribes, choir, mundane staff of the temple. They received the Terumah from the nation 9at first they had first choice and the bulk of the Terumah. When they did not come back with Ezra to rebuild the Temple, but only later, they were punished by Ezra and from that point onwards the Kohanim shared in the Terumah equally).

The Kohanim were a sub-division of the tribe of Levi, being the descendants of Aaron. They were sustained in a few ways
1) they received a portion from the meat of the sacrifices
2) They received some of the hides of the animals they sacrificed to sell for money
3) They got a tithe from the agricultural products (the Terumah shared with the rest of the Levi'im)
4) The first fruits brought on Sukkot

As for Mashiach coming from the House of David- well, thats the way God said it would be. Looking for a deeper reason, it would go to th fact that the courts, judges kings etc have always been seperated from the Kohanim. Since the Mashiach takes on the role of the ruler, it makes sense that the two functions (government and religion) remain in seperate hands.

Answer 2

They were chosen as "priests," so had no land of their own. Without land, they could not farm or raise cattle, so they had to depend on the sacrifices for survival. As for special powers, probably not, but they were given the talent to direct religious services, much as our rabbis do today.