I believe OP is saying the most fundamental thing is people working in government acting moral and in the interest of the country, and not using the power position for self enrichment or engaging in petty corruption for social gain. If you have that then it doesn't matter if your system is capitalist or socialist or a bunch of competing variations where no one agrees. The outcome will always be severely hampered by their constant interference in business, plundering of tax money, and repression of dissent.

Most people probably universally agree on the topic of corruption, unlike economics or social policy. But it requires a well designed political system and a strong culture, which is difficult to do retroactively.