Ah, some responses! Good!
I should have warned DONT READ THE COMMENTS!
Firstly Portofino is right - ML in the UK is exceptionally generous compared to France and Belgium, other countries in Europe I don't know. Childcare is cheap though, and as Bonsoir points out, there is often no financial reason to stay at home here (am in France).
I do think that long maternity leave can be very detrimental to business(but equally the needs of society, and raising the next generation are very, very important). Who has it right?
I am just deeply troubled by this proposed measure on an idealogical basis.