Yes it is. For the duration of the party or collation's control, said ruling majority has complete legislative and executive power, unless it screws up so much

Yes it is. For the duration of the party or collation's control, said ruling majority has complete legislative and executive power, unless it screws up so much that it loses a vote of confidence. If the system doesn't have a strong constitution, like the U.K. ... well, in US terms, imagine the current majority completely changing the way Senators are selected, and replacing the Supreme Court with a different institution. Tony Blair's New Labour did the former with the House of Lords, don't remember who changed them from being the U.K.'s highest court. It is indeed an elected dictatorship, and something we in the US very explicitly rejected. And for some inexplicable reason, in both the U.K. and Australia, the governments (this is generally any of them as far as I know) have all but completely disarmed the people, eliminating as much as they can that ultimate form of feedback; strange, that. (It's not true of Canada, and to a lessor extent New Zealand.)