How many of those other countries modelled their constitutions on the British?

Why are you so focused on the job for life rather than the job that they (used to) do of rejecting ridiculous bills and clauses?

These days the Lords and HoC don’t carry out their functions but not for the reasons that you suggest. It’s filled with useless fill-yer-boots cronies top to bottom, like that Bra woman and her PPI company or that twenty two year old that Boris elevated for no obvious reason or because she was a puppet.