Raise prices all you want. The invisible hand will figure out what people value and what they don't and supply and demand will adjust accordingly. "Your margin is my opportunity."
If we're being simplistic, then I could just as well say:
More corporation taxes = lower income taxes
A citizen should be happy that their government is seeking a greater share of its tax revenue from corporations, especially foreign-owned corporations, because it is easier for the citizen to avoid buying an iPhone than to avoid earning income.
+50$ for an iPhone in the US, +50€ in EU and +5000₽ in Russia.
People in rich nations will spend proportionally less than people in poor ones obviously. (no serious analytics, just thoughts)