If you try to improve conditions for people living in the slums in many different countries, you soon discover that people in positions of political power own the slum dwellings and rent them to the people. Any actions which you take which might adversely affect the financial interests of the owners might be met with political resistance. Depending on which side of the fence you live on, the slum dwellings are either a legitimate form of investment for the owners or a means by which the powerful oppress the poor by collecting rents from them.
Acts chapter 19 describes how there was some collateral damage when Paul spent some time in Ephesus telling people about Jesus. As people were becoming Christians, the market demand for idols was dropping off. The profits made by the silversmiths and craftsmen were drying up. So the people who had a financial interest in the situation decided that Paul and his message needed to be stamped out.
Perhaps if they had thought laterally about the situation they could have come up with new ways of making money, such as new products which people might want to buy without keeping them entrapped by the superstitions of idolatry. But, as normally happens, all they saw was the short-term losses, and they acted in predictably selfish ways, and the result was a riot.