Ignoring all the other non-salary pay they get, I'll buy that low pay can select for rich politicians because it means you can't rely on your Congressional salary to make ends meet. But it only selects for corrupt politicians if the main motivation is to make money. That is the presupposition that seems to frame your whole argument, and the one I have been pushing back on since the original comment. That sentiment undergirds the premise that pay is commensurate with ability. We can create systems that don't select for people with a primary motivation related to financial gain. $10MM salaries ain't it, though.

Someone who just wants to be in Congress to make a sweet $10 million in honest pay would be infinitely better than most of the people there right now.

This just doesn't make sense in the context of what you've previously said. Based on your above post, you're saying low pay selects for corruption because they're in it for the money. But giving $10MM a year selects for people who are in it for the money, meaning you have the same problem. I fail to see how that selects for better people than are there currently if it gives the same incentives.

If you re-read my original comment, I advocate for a "reasonable" salary, but not one that selects for people who have money as their primary motivation. I think there's an argument that $174k/yr is not reasonable for Congress person. We could increase that (and there are proposals to do so*) while also having the guardrails in place that don't disproportionately select for people who care more about money than their constituents.

*I suspect there is more at play than just Congressional salary. E.g., the civil servant salary ceiling is pegged to Congressional pay, so there are second-order effects to consider.