Tipping requests have gotten out of control, but the percent has gone up because inflation happened. Costs have risen in the last 20 years and not at the same rate across the board. The increase in base prices for restaurant food has not changed fast enough for 10% of it to still be a livable wage. I don't love it either, but if I can't afford 20% at a place then I don't go there.
We should do away with tipped wage, and we should increase the minimum wage, but being shocked that wages have changed over 20 years is not a tipping issue.