It's one approach. A bit carrot-and-stick, but what I have seen in restaurants in upper class neighborhoods is chastising changes to public policy. Each menu page has a footnote mentioning there's a X% charge (that isn't the tip) applied to each menu item due to a rise in minimum wage.

Since they re-printed the menus anyways to add the footnote, they could have simply been more transparent and increased each menu item's cost. Most people regularly dining at fancy ocean-view restaurants (which I rarely frequent) can afford the higher cost.