As this is under "Monaco" I will tell you the facts relevant to Monaco ( I know nothing about Switzerland. )
In Monaco there is no 'residential income tax". - There are many other forms of tax however. The VAT is almost 20% and this applies on many things. There is corporate income tax and non-resident income tax ( About 50,000 foreign workers who come to work in Monaco each day )
The very low tax rates in Switzerland have a large say in the matter. See also Monaco, Andorra and other, similar places.
There are actually six countries that border the nation of France. Those countries are: Spain, Switzerland, Italy, Belgium, Luxembourg, and Germany.
Belgium, Luxembourg, Germany, Switzerland, Italy, Monaco, Spain, Andorra have a border with mainland France. > Switzerland, Andorra and Monaco border France, but are not EU members. Andorra and Monaco also use the Euro as their currency. > Brazil and Suriname are other non EU nations that border France (they have a border with French Guiana). > The Netherlands share a land border with France in the small Carribbean island of Saint-Martin / Saint-Marteen.
Belgium, Luxembourg, Germany, Switzerland, Italy, Spain, Andorra, Monaco. Oo, that's 8.
France, Belgium, Switzerland, Luxembourg and Monaco
France Monaco Switzerland Luxembourg Belgium
Austria, France, Germany, Italy, Liechtenstein, Monaco, Slovenia, and Switzerland.
In Europe, French is spoken in France, Monaco, Switzerland, Belgium.
Excluding Monaco, there are a total of 9 other countries that border France. They include Spain, Andorra, Italy, Switzerland, Germany, Luxembourg, Belgium, Suriname, and Brazil.Excluding Monaco, there are a total of 7 other countries that border Metropolitan (or European/Mainland) France. They include Spain, Andorra, Italy, Switzerland, Germany, Luxembourg, and Belgium.
Switzerland, Austria, Slovenia, Croatia, San Marino, Monaco and France
Spain, Andorra, Italy, Monaco, Switzerland, Germany, Luxembourg and Belgium.
France (only official language) Belgium (along with Dutch and German) Switzerland (along with German, Italian and Romansh) Monaco