Cost of living in Milwaukee, Wisconsin (United States) is 20% cheaper than in Al Mubarraz (Saudi Arabia)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 222 prices entered by 55 different people.
For example, to keep the same standard of living that would require ﷼ 14,000 in Al Mubarraz you would need to make just about ﷼ 11,256 ($3,006) in Milwaukee, Wisconsin.