Usual English. (Note that the English word "laissez-faire" is spelled differently from its French original "laisser-faire")

Sounds fine, but is there an other expression that can stress the pejorative connotation of those Liberals only focussing on economic liberalization but not on poltical liberalism?

No, not really. In English, the word 'liberal' usually refers to society and culture, not to economics.

Within the specialized context of economics you might try 'neoliberal.' But to the public at large, that's basically the same as conservative, or possibly neoconservative.