How generous are you with regard to tips?
For me I find the majority of them pointless. Especially when most people will turn a blind eye to the homeless, those selling Big Issue, or buskers.
I know the jobs where tipping is customary are generally low-paid, but so is garbage disposal. So is cleaning. Do we tip those? No.
The only example where I think I am fine with tipping is with takeaway delivery - but that's more out of impatience and telling them to keep the change
I think taxi drivers make a ridiculous amount through tips - so I avoid tipping them. And waiters...what's the point? Oh well done, you've done what I could have done had I gone to the till myself, ordered it myself, and carried it myself.