It’s not a culture thing. It’s a legal thing.

Tipped employees are paid far less than minimum wage before tips. They are guaranteed at least minimum wage if they don’t earn enough in tips (the employer has to make up the difference) but they can be fired for any reason. Not pulling enough tips to cover minimum wage is, effectively, a fireable offense.

If we eliminated the sub-minimum wage rate for tipped employees, tipping “culture” would quickly disappear.