While I know you weren’t quite serious, I’ll respond anyway. PayPal once was the on-ramp for people interested in gambling online. The government wants records of people’s transactions going back to 1999. What’s to keep the government from saying “hmm, we weren’t looking for this information originally, but now we have all these people who are ‘illegally’ gambling online, let’s prosecute a few of them”.
Personally, I don’t have anything to hide, but I’m just not that trusting of the US government when it comes to having so much information on it’s citizens. Yesterday they wanted Google and Yahoo’s search data, today they want PayPal’s transaction data, tomorrow who knows. It’s more that it’s a slippery slope.