The major difference is that if Amazon stop running well then someone else will come along and replace them. Whereas government is a monopoly, so if it runs badly then it doesn't automatically get replaced.
Now, democracy is supposed to fix this, by allowing you to vote for a different supplier of government every few years. But because of the voting system in some countries (like the US and the UK) it's actually really hard to do this, because everything gets turned into a black/white struggle between opposing forces, rather than lots of options being available for you make a choice between.
Now, democracy is supposed to fix this, by allowing you to vote for a different supplier of government every few years. But because of the voting system in some countries (like the US and the UK) it's actually really hard to do this, because everything gets turned into a black/white struggle between opposing forces, rather than lots of options being available for you make a choice between.