
You might find this interesting but Saint Louis severed its city from its county long ago and might actually be worse off for it. They’re completely separate entities (governments, tax rates, services…etc). This happened when the city was thriving and didn’t want to pay for the suburban expansion but now that downtowns are emptying out the city is faced with plummeting tax revenue while the suburbs thrive. If they were still the same entity then the income from a prosperous county could help