How have societal forces like the COVID$-19$ pandemic and the widespread adoption of touch$-$screen point$-$of$-$sale tablets transformed the culture of tipping in the American food$-$service industry? Discuss the implications of the shift from a traditional, discretionary tipping system to the prevalence of preset tip options on touch screens. Consider the ethical, economic, sociological, or psychological factors at play, and explore whether 'tipflation $($a marketing term for the upward trend in expected tips, from the standard $15$ percent of decades past to $20$ percent and $25$ percent and beyond$),\text{'}$ 'tip creep $($the spread of touch$-$screen tipping prompts across the food$-$service spectrum$),\text{'}$ and 'tip fatigue $($the backlash from tip$-$weary diners$)\text{'}$ are sustainable trends in the long term. How might these changes impact the dynamics between customers, servers, and restaurant owners?