Do you like ghettos? Would you like to see more of them near you? Describe your ideal ghetto and where you would like to see it located.
In my opinion, ghettos, slums, projects whatever you want to call these areas, are full of blighted buildings and a mixture of useful and dangerous people.
To me, it should be a goal of cities everywhere to remove as many blighted buildings and as many high risk people that are on public assistance. The risk of different individuals vary. A higher risk individual would be someone with a criminal record, frequently unemployed, didn't graduate, etc...
Cities are high demand areas that should be attracting the best, particularly when it comes to low income people that depend on government assistance. Phase your highest risk people out with lowest risk people and don't bring in more high risk people. There are different ways of doing it, it can be very abrupt or less abrupt, but the goal should be to replace high risk with low risk and to not let the population get much higher than the available jobs to support them. Check with economists and business leaders to determine an adequate number of low income workers needed.
Relocate the highest risk individuals as far away as possible. Make that a condition of receiving government assistance. The higher their risk, the further away they should be.
Big cities have billions of dollars worth of investment. That's not where you want to keep your high risk individuals.
Give me your best arguments for why you would want your highest risk people near your best infrastructure. Explain how it would benefit the city to have them.