Taking care of business.
The Boston Tea Party was not a protest against the British Tea Tariff, the Brits had already lifted the tax, allowing the East India Company monopoly to sell tea at a price that undercut the smugglers who were getting rich off selling contraband tea. That's why they (the smugglers) threw the tea into the harbor.
This is not a slam against our founders, it's just the way all history works, after you remove the propaganda.