Do the tax levies on income from assets, such as the social contribution on income from assets, the social debt repayment contribution based on that same income, the social levy of 2% and the additional contribution to that levy, have, by virtue of the mere fact that they contribute to the financing of compulsory French social security schemes, a direct and relevant link with some of the branches of social security listed in Article 4 of Council Regulation (EEC) No 1408/71 of 14 June 1971 on the application of social security schemes to employed persons, to self-employed persons and to members of their families moving within the Community, 1 and do they thus fall within the scope of that regulation?