Don’t be so sure mate, definitely still depends on which kind of parliamentary system. We have a parliamentary system and one problem is that small parties find that their supporters are spread too thinly, and without having enough of a concentration of supporters in one constituency you aren’t able to get a seat in Parliament, meaning you have no influence whatsoever.
For example, at our last election the Brexit Party got over 600,000 votes (2% of the vote) and didn’t win a single seat. The SNP (Scottish National Party) got about 1.2 million votes (4%) and they got 48 seats in Parliament. The Liberal Democrats got an 11.5% vote share, about 3.7 million votes, and ended up with just 11 seats, when proportionally they should have about six times as many.
This is more to do with First Past the Post, rather than it being a feature of all parliamentary systems, but just saying that parliamentary systems can certainly have their drawbacks too. I can’t stand our electoral system here in the UK, people have different opinions, but imo you look at the figures above and its just totally unjust.
I can’t stand the Brexit Party and probably couldn’t be more different to the majority of their voters, but I find it hard not to look at the results above and think it’s a complete injustice. They got half as many votes as a party with 48 seats, and don’t have a single seat. For context, there are 650 seats, so having 48 seats makes them the third biggest party (Lib Dems fourth with their eleven seats) in the country after Labour with just over 200 and the Tories with I think 360 odd.
So if you were living in the UK under FPTP, your vote for a socialist party would basically also be an utter waste of time, because there’s no constituency they’d ever win in, so all votes for them across the country would result in basically nothing.
I’ve always favoured proportional representation because I think our electoral system is so fucking shit.