> Both systems can and do commit huge amounts of resources to pointless, destructive forever-wars.

Only in capitalist systems is this a process of enrichment of the ruling class. The transfer of wealth in the US to the richest % on the basis of war has been immense. They're not pointless geopolitically either, since it serves to stifle and subjugate foreign governments into US alignment to support western predatory and exploitative economic policies (enforcing predatory loans and commanding oil trade). Hence aggressive imperialism combines several aspects of maintaining economic and military hegemony.