I have no problem paying my taxes. I pay income tax, business tax, residency tax, national health care premiums, national pension plan deductions, consumption tax, and various-and-sundry other fees and taxes. Altogether these amount to more than $6000 per month.
But I am not fond of tariffs or import taxes; these do not go to support healthcare, education, or infrastructure, they are intended to protect domestic industry and agriculture from foreign competition. Here in Japan everything expensive, and much of the reason is the tariffs and taxes imposed. Tax on rice is more than 700%, dairy and meats are up to 250%, leather goods, and other things are highly taxed. The net effect of high tariffs in a country where most things must be imported is a high cost of living, and this in turn has resulted in a population decline of more than 100,000 per year. This sharp decline in the population means trouble because without an increasing population, the national pension plan and healthcare plans will eventually become insolvent. As it is, Japan's national debt is 250% of GDP, far higher than that of Greece.
If a customer of mine asks me to declare a package to a particular value, I will do it without hesitation. If I don't do as he asks, then he won't buy what I am selling, and if he doesn't buy it, I don't get any money. If I don't get any money, then the people who sell goods to me don't get any money, and if they don't get any money, they buy and consume less, and the effect is felt my many. I pay my full share of tax on the money he pays me, and the people I buy from pay taxes too. The less they sell, the less tax they pay. Japan doesn't care much about documentation for goods being exported, but they are particular about imports, and any money coming in.
If the customer doesn't buy, then no one wins, and the government gets nothing at all, which means that healthcare, education, etc get nothing. If the value is declared lower, and the customer does buy, then the governments of both countries get more than they would otherwise. Japan gets the 35% they tax me on my profits, and the customer pays his 18% to 80% of whatever is written on the shipping label.