What we are seeing more globally in Europe is the disappearance of the middle class. For the last decade this middle class had to bear all the tax (so that poor people can be lifted out of poverty and protected by the system), no reduction, no possibility of evasion (like rich people have), increase of food prices (permanent), electricity (now) and the doubling even tripling of the cost of real estate while our salaries barely grew. Entry level salaries in France or UK or Germany are not that different from 10-15 years ago while everything else exploded in cost. Add to that the fact that your city attracts foreign rich people and investments and you done. Paris real estate is a joke and the city only ends up with rich people and very poor people (hosted in projects) the middle class has to move to suburbia with limited infrastructure , doctors, things to do (obviously a nice suburb will be paris prices if not more).
In the USA you can still make a six digit salary doing blue-collar work (hard one) and many jobs pays high 5 digits for a middle-class worker. Not even talking about software that is really a class-climbing profession that we definitly don't have in europe (software doesn't pay here and its very rare to go six digits while in HCOL cities of USA its standard year 1 pay)
at the end most of the 10year ago middle class became a class of white collar workers that live paycheck by paycheck and when the economy will tank in the coming months many will go back to poverty as soon as they loose their jobs.