Using people to pick up trash and throw them properly is the solution that has been used for centuries. Crows are paid peanuts (literally) for bringing back trash. They are employees.
And I am sure that if you were to offer people a dollar as a reward each time they bring back a trash to a trashcan, the parks would be clean.
In Berlin glass bottles are reused and there is a reward for bringing them back to specific bins. I have seen homeless people looking for trash and filling carts of these.
That reward as you call it, has created a 2nd level economy in Germany.
It is not only homeless, people with very low pensions or not able to get a proper full time job also hunt for them, everywhere.
On the streets, trains, subway, beach, lakes, you name it.
To the point that many people don't throw away bottles anymore, leaving them grouped outside the trash cans, as means to help those people pick them without messing with trash.
There are even trash cans in the Rhein region that have bottle holders around them.
So yeah it helps keep the street clean from bottles, but fighting the causes of this 2nd level economy would probably be a better idea.
Our public waste bins are designed like this in Vancouver. People put bottles/cans with deposits in a circular metal holder below the rim of the trash bin so that the homeless can pick them up easily. There are a LOT of homeless here. I moved back to Canada from Central America and my first impression of being back in the developed world is my god look at all the homelessness.
That happens in San Francisco, too. You'll on occasion even see someone on the local public transit with a big trash bag full of bottles. I guess they're on their way to a redemption center for the deposit.
And I am sure that if you were to offer people a dollar as a reward each time they bring back a trash to a trashcan, the parks would be clean.
In Berlin glass bottles are reused and there is a reward for bringing them back to specific bins. I have seen homeless people looking for trash and filling carts of these.