http://blacklivesmatter.com/demands/ has five key national demands. Four of them do not involve any economic redress. The fifth is a partial redress, but is about as radical as a wet paper bag. State expenditure on law enforcement is not particularly high compared to state budgets as a whole, and reducing it by some fraction of an already small amount to spend on black communities will do almost nothing - it's baubles for beggars.
Obviously, #blacklivesmatter is a decentralized movement and different chapters or even just associated individuals will have different focuses, but I don't think it is all unfair to say that #blacklivesmatter does not concern itself with the economic oppression of black American communities.