Has France become a tax haven? asks Nathaniel Litmann in The Schmidt Report. A November article in Tolley's Taxation suggests so.
The rules, which are complex and appear to apply mostly to non-domiciled UK residents, arise because of a new measure called the 'bouclier fiscal'. This in effect limits all direct tax to no more than 50% of income.
So if you are able, legally, to shelter your income elsewhere (i.e. you're an entrepreneur or live off investment income), there is "huge potential" for tax savings.