Consider it this way: it is absolutely a way to funnel money to his companies because he is (probably genuinely) obsessed with getting to Mars. More money for his companies means faster development of his technology, and the ability to do more in parallel. He knows this, of course. It doesn't matter if the reason for his greed is Mars, or just plain old greed.

Musk's position as CEO of SpaceX and head of DOGE is the most conflict-y of conflicts of interest when it comes to deciding what happens to NASA. It 100% doesn't matter if he is the truest of true believers in the need to make a settlement on Mars. We should not be giving him the power to dismantle other space-related efforts to fuel his personal project. Even if he is right at how critical Mars is, it is incredibly dangerous to allow people with conflicts of interest to be responsible for decisions on this scale.