Regardless of what one does in the working world, people should be able to survive and have a standard of living that is humane. The poor during Wilde's time and the poor of today (which includes me) are not a bunch of lazy deadbeats whining and complaining to have the middle class and the rich and powerful "take care of them" as "forced charity" implies.
The work we all do should be able to provide enough emotional comfort that our lives are not forever preoccupied with making ends meet. Wilde was arguing that charities perpetuate the unfair economic system of capitalism that rewards the rich and punishes the poor. If people's earnings were better then people wouldn't have the need for charities to exist in the first place.
Charities were in Wilde's time as it is now, just another way for people to pat themselves on the back and convince themselves they're "good people" while not having to deal with the root problem. And of course there're those tax breaks for giving to charities and also others around you can tell you how good a person you are for contributing to charities.
