Here's another policy that may or may not be left-wing, but how about if MPs -- all of whom have been elected to represent their constitutents in the HoC -- have to vote EVERY TIME?
Unless they're outside the country, or laying in the ICU with tubes down their nose or whatever.
But how on earth can any MP justify abstaining from a vote that they could reasonably attend? What do they think their job is, if not to represent?