Earlier quoted context omitted.
That's interesting. How would you change it? The Executive having the power to pardon (or to refuse to prosecute) for crimes is meant as a check on legislative power to make life miserable through imposition of bad law. Just throwing that check away seems a bit destabilizing. I mean, I'm with you on the the American justice system being capricious in terms of minor crimes being able to ruin a person's civil standing…
I think it's less about what formal powers the different branches of government have, and more about how they use them in practice. As a parent comment said, the USSR constitution was good on paper, but not so much in practice. On the other hand, here in the UK, the queen technically has supreme power over everything (and even ignoring that, our Prime Minister is head of both the executive and the legislature), and y…
TL;DR Politics is downstream of culture.