Often private landlords pay taxes ( like everyone else on theor prpofits) and those taxes can fund benefits and social housing.
I'm sure anybody who doesn't have a vested interested in desperately scratching around for a justification for their method of deriving an income can see how badly flawed this argument but is but anyway - Iain Duncan Smith pays taxes on the income he makes from his job, does that make him a force for social good? His taxes help pay people's benefits too! If a drug dealer pays tax on their earnings does that make them a force for social good? Or what about if I set up a company that buys all the bread in the supermarket every morning and sells it on a stall outside for a tenner a loaf, I'll pay tax on the profit and people need bread right? does that make my company a useful social enterprise?
I think you'll find that pharma companies would fail your test. They sell medicine at quite a cost to us.
Not sure what test I ever mentioned, and pharma companies may sell drugs at a profit, but if they didn't those drugs wouldn't exist in the first place. Neither is anyone forced to buy drugs if they prove to be useless. Churchill was bang on the money in his explanation of how landlordism is not like other useful business activities:
"Roads are made, streets are made, services are improved, electric light turns night into day, water is brought from reservoirs a hundred miles off in the mountains -- and all the while the landlord sits still. Every one of those improvements is effected by the labor and cost of other people and the taxpayers. To not one of those improvements does the land monopolist, as a land monopolist, contribute, and yet by every one of them the value of his land is enhanced. He renders no service to the community, he contributes nothing to the general welfare, he contributes nothing to the process from which his own enrichment is derived."
So, how exactly do you plan to halt capitalism
a) We don't live in a pure capitalist system, otherwise there would not have been any bank bailouts.
b) If you think the housing market, one of the most heavily government manipulated markets around, with artificially restricted supply and artificially inflated demand is in any way representative of capitalism you don't know much about economics.