Do you have data supporting this? I took a few minutes to select a few ginormous American megacorps in various industries and asked chatgpt to help select the best non-US analogs to compare to. Then I pulled up their financial statements and compared some key ratios over a few years: net income / net revenue (profit margin), net income / net equity (return on equity), and net income / total assets (return on assets).
I looked at Verizon and Vodafone, and then GM and Toyota, before I decided to actually do some real work on this and put some real data together. My results were inconclusive: verizon is kicking vodafone’s ass, but then again telecom is absolutely fucked in this country so no big surprise there. GM and toyota split the metrics pretty evenly; one better in one area, the other better somewhere else.
So I’m not convinced yet profit margins are abnormally fat in this country compared to international business. It’ll take a lot of data points from a lot of companies over a lot of years to really get a satisfactory picture of whether your point is truly accurate.