The 210,000 refugees crammed into the transport ships were Gu Hang's 'spoils of war' on the political battlefield, all destined to be relocated to live on Rage Owl Star.
This was a legitimate value.
Five Tax Currency per person was the pricing set by the Empire. Taken to Rage Owl Star, even if they did absolutely nothing but set up refugee camps to sustain these people, after two years, once the Imperial Tax was paid, it could offset a million in Tax Currency.
But how did these people come about?
Firstly, it was the Tianma Star Sector's various planets... 'looting' Korolya.
Before Galaraldo disappeared, Korolya's situation was already deteriorating. Many of the learned in the Star Sector could tell that,
under the call of the Star Sector Government, the governors of each planet, some other forces within the planets, and even the wealthy were all "generously digging into their pockets," providing some manageable relief for Korolya III.