Actually, I wouldn't be in favor of funding levels nearly that high
Back in NASA's peak funding years, their annual budget was roughly twice what it is today when adjusted for inflation. NASA had so much money that their unofficial operating philosophy was "Waste anything but time." They did this very well - they rushed things so much that they killed the Apollo 1 crew while wasting money at a fantastic rate.
One thing fairly tight budgets do is require people to prioritize and focus their efforts. I wouldn't mind a NASA budget on the order of $20-25 billion a year.