The US system has power more fragmented than most. In Europe, the Senate often doesn't wield any power (it rubber stamps anything the legislature approves). The executive is a part of the legislative.
In parliamentary system, individual MPs are "whipped" into voting with the party, and can basically be pushed out of power if they don't go along with it. If the party in power has a large majority, there is nothing but the courts to stop them from passing whatever they want.
Canada is a dictatorship though most don't realize it. MPs can't tweet anything unless it's approved by the PM. You have a hundred heads speaking with one voice.
It’s an interesting system looking from the outside in.
A party with a majority in power has little to stop any legislation the party decides to pass.
The senate is mostly a rubber stamp. The courts are independent but won’t nullify legislation unless it violates the charter.
MPs can’t not vote with the party unless they want to risk their political career (or it’s a free vote - but that’s reserved for unimportant legislation.
The ruling party can pass whatever the heck they want without much concern.
The US system has power more fragmented than most. In Europe, the Senate often doesn't wield any power (it rubber stamps anything the legislature approves). The executive is a part of the legislative.
In parliamentary system, individual MPs are "whipped" into voting with the party, and can basically be pushed out of power if they don't go along with it. If the party in power has a large majority, there is nothing but the courts to stop them from passing whatever they want.