DFS operates in tax-free zones agreed in advance with countries customs authorities. So inside Changi secure area, sinkieland calls it outside of tax jurisdiction so can buy things without paying import duties and whatever tax kastams willing to exclude. So the stuff is bought at cost with liquor or ciggie duties for example. This is significant savings to bottom line for DFS.
The catch is, sinkie gahmen still owns airport and gets income from leasing the space to DFS. So what they do? Jack up rents sky high. So instead of left pocket make through duties on sale, right pocket make from rental to DFS. The way DFS makes up for this though is to sell like mad. So DFS assistants always ready to help yo buy stuff and give recommendations. Because fixed cost is high and unit cost is low, more sales = more $$$. If sales down, then uplorry.
ok?