The United States has no sales tax, per se. (There's a few flavors of excise tax at the federal level.) California, and many municipalities in California, have sales taxes. They are routinely exacted from people who don't live in California, including (most relevantly by volume) other Americans. To my knowledge there has never been a serious discussion about tax totalization at either the international or national level because it would be an absolutely
mammoth undertaking. By comparison, in some countries taxes are imposed by the national government, and totalization is virtually automatic within a nation and comparatively easy to arrange for international tourists. (Also, those nations
tend to have much higher taxes, and they've made the decision to rebate them to international tourists so as to encourage them to not go to locales with more favorable tax regimes.)
What happened to "No taxation without representation"?
Not the best analogy, since foreign visitors are ordinarily not entitled to much say in the internal affairs of their host countries and can pick freely from all available tax regimes to purchase their goods from, but a good piece of rhetoric. You might consider bringing it up with your elected representatives. I rather suspect that they will be unsympathetic, as the Californian electorate routinely signals that they would rather pay salaries/health care/pensions for state workers than lower taxes on people who don't reside in California. (I managed to pay approximately $1,500 in taxes to California last year just with a business trip -- yay hotel tax.)