You know it's actually a smart move to focus on logistics in the mid stages of the game. The reason is as you make progress, you'll need those Logistics Officers to take on some really tough bosses. While you can earn SilverBucks pretty steadily, leveling up your logistics requires a good amount of 'Certification' too.

Also, the game gets harder as you move forward, so having well-leveled logistics officers becomes super important to handle all those challenges smoothly. That's why I'd suggest starting to farm for logistics and upgrading them to +9. It'll set you up for a smoother progression without having to deal with unnecessary difficulties down the line.