Inflation might be turning Americans into grinches this holiday season, new data suggests. In a survey of 1,000 consumers and 165 restaurant owners and operators across the US this month, just 43% of consumers are now tipping their servers 20% or more, a significant decline from 56% of customers last year. That’s according to a recent survey from restaurant technology company Popmenu, first reported by MarketWatch. A separate survey from PlayUSA, an online gambling site, polled 1,006 people and found 17% of Americans are tipping less because of rising costs, while 60% of Americans said they wanted to ditch tipping...