That doesn't sound any better. So if I have an asset that I'm not using, it's morally just to take it from me because I'm not using it?
To give an absurd, extreme example: if you lived in a nation going through a famine and your hobby was watching bread mold, it might be morally just to take away your warehouse of stockpiled bread to let the starving people eat, even if it meant you couldn't continue your thrilling bread-mold-watching hobby.
Morally? Definitely. Incentivizing trade promotes human survival. Is it "just" is a different question, because justice requires a set of idealogical social principles to start from. Natural rights, divine will, reparative, or some other. YMMV