So every citizen spends $1000 and suddenly you have a Mars colony? No, you have to develop the technology, and that takes time no matter how much money you throw at it. And when you look at the year 2042 and imagine having a Mars colony by then, having an order of magnitude more money rolling around by say 2022 or 2032 won't help if it takes longer than 10-20 years to develop the needed technology.