The corruptive influence of corporations and the wealthy extend beyond parties. However, individuals in a party can still fight corruption.
The problem is that the public at large seems to ignore many issues as long as their person is the one in charge.
Could this ultimately mean that corruption will be a natural side effect of extensive government power? A vigilant press/populace would be useful and may be what's missing today... but in these niche industries the mega-corporations are still the one with the deepest pockets and the most motivation as they have the most to win/lose.
I'm not trying to make this ideological and anti-government, it's just an interesting thought to consider, that it's possible the only power that can't be exploit is either one severely limited and inherently closely (which may defeat the utility of such a power) or having not power at all.
Not defending Trump, but GS current and ex-employees have held high level positions in every administration for years. I'm sure GS employees are likely some of the best in their field, but it does leave one wondering when hard decisions get made will they do what is in the best interest of the country even if it is somehow detrimental to GS.
With that said, I hope that when Trump leaves office that people still pay this much attention to what is happening in the government. No matter what your personal views are, holding government accountable is key to a good functioning government.