Interestingly the US system was always more vulnerable to corruption, and everyone knew it. Our executive branch is far too powerful. That’s why when the US has engaged in nation building they never install governments like ours. Germany, Japan, Iraq, etc. the pentagon always insists on a parliamentary system, because they’re better in every way (less prone to grid lock, less prone to tyranny of the minority, weaker executive, etc.).
Regulatory capture and citizens united both exist to undo those checks and balances. No system is immune to corruption.
Interestingly the US system was always more vulnerable to corruption, and everyone knew it. Our executive branch is far too powerful. That’s why when the US has engaged in nation building they never install governments like ours. Germany, Japan, Iraq, etc. the pentagon always insists on a parliamentary system, because they’re better in every way (less prone to grid lock, less prone to tyranny of the minority, weaker executive, etc.).