Complex sentence: He further envisaged a three-tiered system of government headed by an elected European government to organise defence and the corporatist economy, the continuation of national governments and a collection of local governments for the sake of independent identities.
Split into simpler sentences: He further envisaged a three-tiered system of government headed by an elected European government, to organise defence and the corporatist economy. The continuation of national governments, and a collection of local governments was still seen as necessary, for the sake of independent identities.