Yes, I think it would be a good idea. The Youth Mobility Scheme visa is based on reciprocal arrangements, which is why the countries who are included so far are so random (Canada, Australia, NZ, Monaco, Japan, Iceland, South Korea, Uruguay, Andorra, San Marino). It used to be known as the working holiday visa.
An expansion of the Scheme to EU countries has been suggested for many years by immigration lawyers. It's not a long term visa i.e. it cannot be extended past the 2 years, and time spent in the category does not count towards permanent residency.
This will solve all the Mumsnet au pair problems..