This is analogous to Singapore, with a huge army of workers resident in Malaysia crossing over every day, and most returning every night. Hong Kong is somewhat similar but less so: there is enough cheap housing for a significant proportion of the cheaper labour (below millionaire class) to live in the economies boundaries.

The article does make it clear that Monegasques have significant state support for housing but that's on the assumption they aren't millionaires. The mobile workforce from outside is presumably given one of two "perks" -lower taxation outcomes (although I suspect there is some bilateral tax treaty) for at least income tax, and higher pay than they'd get working in their domicile.

I'm trying to steer clear of approval or disapproval writing this. I can't imagine making either of the two choices: to be a tax exile living there but with no statehood, or to be a mobile worker working there but having to return to an EU economy every night. The third option, being Monegasque is not open to me any more than Maltese citizenship, which is also much sought, and hard to get although not as hard as this one.

A surprising number of british working class people have Maltese citizenship, similarly Gibraltarian: thats what the british Navy does for you. I wonder if in millionaires row their advice for non-dom includes "marry a maltese"