The Prime Minister can dissolve the Parliament and call for new elections. So the government can be recalled at any time, and elections can occur at any time. Centralized v. Divided Government Contrasts with U.S. system. Irregular v. regular elections. Concentrated v. distributed authority.
Parliaments can be unstable, divided government can deadlock.
Many hybrid systems exist. U.S. Environmental Policy History of environmental policy in the United States begins in the colonial era. Military surveys and campaigns in the United States set precedent for federal control of public lands. Today, approximately one-third of the land area of this country is owned by the federal government. Set precedent for federal ownership and resource management, and also set precedent for a national government that had assets beyond those of the states.