Because NASA's budget is 0.490% of the federal budget, that's why. It wasn't always all bad though. Remember when we had to "fight the communists"? We got 4.4% of the federal budget. What did we do with just 4.4% of the federal budget? Landed on the motherfucking moon and made exponential scientific advancements that we are still reaping this day. Now NASA's budget is a stain on a bucket. Look at this shit:

Because America isn't the only country doing space exploration =P