I guess it's possible that large companies have outgrown the need for US Government support internationally and figure its cheaper and more effective to lobby the leadership of countries directly. The problem is that this approach opens up Western nations to a new form of neo-colonialism. When Western "democracies" are controlled by large corporations, the door is open for the state-owned companies of China or Saudi Arabia to acquire these companies, and thus, their influence over Western nations.
That just makes it worse: people pay taxes but don't get value for their money, while corporations pay no taxes but get lots of value for other people's money.
In other words, the morality of paying taxes is directly dependent on the legitimacy of the government demanding payment. And that legitimacy in part derives from their very actions, for which in an ideal wold they would be held accountable.
I'd be happy to pay the amount of taxes I'm currently paying in California if tax dollars were used well, but as it stands the public schools are underfunded, the highways are full of litter on the side, higher education isn't free, healthcare isn't universal, social security is underfunded, public transportation is dysfunctional, and so on.