I've noticed improvements by foreigners, locals but not so much w/ helpers. I notice people dilluting the urine (water/vinegar or maybe just water) and picking up the poo. I walk after dark in the evening and many a helper is camped out w/ the cell or friends while the pooch lingers nearby. Perhaps the owner does not care but it is still their responsibility.
what a pile of poo

Did you keep statistics on pee & poo cleaning habits by nationality and/or skin color before and after?
How you define a "helper"? A South East Asian woman that's constantly on the phone and doesn't look like a spoilt tai-tai?
I still see exactly the same as ever. Some people care about their dogs (and their pee/poo) and some others don't give a toss. Same as some people clean up after themselves, others don't. Some smokers throw butts in the bin, some think the floor right in front is more approriate. Some drivers understand the difference between an estate and a highway - some don't. Need to continue?
As for the outsourcing: leaving pets at home while going to work/on holiday would be worse, no? Some ppl really want a dog as a friend so why not - it's a free world, still. Not saying I agree with keeping a dog in a shoebox, but ...