I never understand why these shops have so much liquor .   What do you mean ? It's because it's much cheaper to buy liquor duty-free .   But why ? Why don't people like to buy shirts duty-free ? Or shoes ? I just don't understand why it's always liquor .   Well , it's because in most countries liquor has a higher tax on it .   You mean liquor has a higher tax than other things ?   Yes , of course . Didn't you know that ?   No , I didn't . How high is the tax ?   Well , it is different in different countries.But it's because of the high tax that buying liquor duty-free is such a good deal .   Why would the government want to tax liquor so much ?   Liquor is considered a luxury item.And also , it is considered as something that isn't very healthy.So if people want to buy it , the government thinks it has the right to tax it .   That's why a lot of people buy cigarettes here too , isn't it ?   Of course . Cigarettes are also taxed very heavily . 