I ordered a lock and some keys valued at about $400, and paid an extra $400 in duties because of this. It's insane.
1: You don't add up and pay the tax board every month right? In fact this is the central theme to successfully collecting taxes, never collect them directly from the public if possable. That is a hard thankless task. It is much easier to steal them from the much more easily policed companies, before the public sees the money in the form of income tax or when they buy in the form of a sales tax. As a specific example remember the "use" tax, you were supposed to do just that, add up and pay the sales tax for things you bought out of your sales tax jurisdiction, this proved impossible to collect so with the massive increase in sales out of the tax jurisdiction(cough, amazon, cough) the courts ordered that each company had to now keep track of and pay the sales tax for every infernal piddling little sales tax area, a huge hassle for them, but that's not the states problem and it is much easier to enforce than having each person do it.