If you visit Sweden, don't buy ice cream in the historic area of Stockholm ("gamla stan").
As an American you might think "$10 for a single scoop of vanilla, that's nothing. A minimum wage worker packing groceries earn twice that in an hour back home". But you are not helping a starving ice cream labourer with your purchase, you are simply being taken for a ride. Walk a couple of blocks more and check the signs, and you can buy it at half price from a respectable establishment instead. Most likely the ice cream will be better at the next place as well.
I cringe when I hear Europeans proud that they haggled to death on an African market to lower the price from "cheap" to "dirt cheap". Dude, that's pocket change for you, can't you help the local economy a bit, and help the guy feed his family?
Is this a joke? $10 for a single scoop of ice cream in the US is a lot of money and also the US minimum wage is only $7.25/hour. You can barely feed yourself with the US minimum wage and you definitely can't pay for shelter or healthcare or anything else you would need to survive here, but that's a story for another time.
The local working in hospitality is earning minimum wage, the premium you pay goes to the landlord.
Also, as a visitor with substantially more purchasing power, you can afford to tip the lad working for local minimum wage