Hard to answer without more info, so I’m going to make some assumptions, YMMV. Depending on the area and situation, $150k could be reasonable, or ludicrous.

If it’s significantly above their personal expenses and you are uncomfortable with it, I would ask myself if they are cofounders or employees.

You should have a candid conversation about what the seed money is for. It could be the case that they never considered your perspective, and this is a good opportunity to get aligned on the topic.

Side note, salary disparities between cofounders are a potential future source of resentment.