Cutting the number of MPs in half would be number 1; as well as number of minions per MP. The House of Commons is ridiculously bloated with a lot of MPs being placeholders vice active participants. Similarly the Senate is probably too big for it's function. And along the WFH mandate, if PS servants have minimum attendance in the office, both Parliament and the Senate should have similar, with salaries getting prorated otherwise. (although I'd honestly kill that mandate and leave it up to supervisors to figure out what make sense with managers/etc having approval for hybrid/fully remote work).