system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why won't NASA just crowd fund their manned flight to Mars?

I hear they won't be ready till the 2030's and can only assume because of budget/modern technology restrictions. But why don't they crowd fund it? Let the people speak with their money! We want Mars!
gpt
The issue is not really funding, the issue is technology. It has not yet been invented and just throwing money at it will not really make it happen faster. 

Edit: That said NASA does have a system for collecting their own donations and so do not need a middle man.