[Excerpt] This Directive thus represents a first step on the way to an internal market for occupational retirement provision organised on a European scale. By setting the ‘prudent person’ rule as the underlying principle for capital investment and making it possible for institutions to operate across borders, the redirection of savings into the sector of occupational retirement provision is encouraged, thus contributing to economic and social progress. The prudential rules laid down in this Directive are intended both to guarantee a high degree of security for future pensioners through the imposition of stringent supervisory standards, and to clear the way for the efficient management of occupational pension schemes.