The biggest scam in life is paying taxes on the money you earn. Paying taxes on the money you spend. And paying taxes on things you own that you already paid taxes on with already taxed money.
Discussion
the biggest scam is that somehow people accepted that we're the only animal that needs to be centrally governed because otherwise we couldn't possibly survive.
Fiat was always a scam
And then the government printing that money and taxing you via inflation! opt out NOW!
the greatest trick of them all
The only tax should be a wealth tax, even if it's just a land value tax. It's an old idea sometimes called Georgism.
It has many advantages. And it may be the only feasible tax if all payments are private over Bitcoin