1. Government workers are your fellow citizens, and they have a right to privacy as everyone else. I don't think "how much a specific low-level government worker earns" is anybody else's business. If you are worried about government spending, you should be able to check aggregate statistics.
2. If companies can spend/earn $1B without anyone knowing, how are we going to tax them properly? If only the government knows and no one else, then we're basically asked to trust the government and corporations to be honest. When they are't, they cause much more financial harm to me (because my tax has to make up for it) than some county office giving everyone a higher raise than necessary.
I don't see how tax is a valid point. 99% of individuals and corporations do not have their spendings - that's not only the net flow, but also the breakdown of revenue and costs - revealed to the public. To imply that they might be dishonest, and that dishonesty will not be caught by the government, would mean that everybody has to release their spendings to the public. Mark Zuckerberg could be cheating on his taxes. You could be cheating on your taxes. Surely you don't want to cause financial harm to the rest of us?
2. If companies can spend/earn $1B without anyone knowing, how are we going to tax them properly? If only the government knows and no one else, then we're basically asked to trust the government and corporations to be honest. When they are't, they cause much more financial harm to me (because my tax has to make up for it) than some county office giving everyone a higher raise than necessary.