That would be tricky because you are comparing apples and oranges. Consider that for the USA, there are only 11 cardinals (of 252 worldwide), while there are 10x more federal senators at any moment (I don’t know if there would be more or less total: senators tend to be much younger but cardinals also tend to be long-lived), and I can’t even guess how many ‘Fortune 500 C-level employees’ there might be given corporate turnover and the size of many ‘C-suites’ - tens of thousands, maybe? So your suggestions span ~1-3 orders of magnitude less selectivity than cardinals do.
Maybe we could look a 4-star generals, of which there are under 40 total in the US? Not quite as selective, but a more similar process. (Or perhaps around as selective given the number of US Catholics, vs. US citizens.)
That would be tricky because you are comparing apples and oranges. Consider that for the USA, there are only 11 cardinals (of 252 worldwide), while there are 10x more federal senators at any moment (I don’t know if there would be more or less total: senators tend to be much younger but cardinals also tend to be long-lived), and I can’t even guess how many ‘Fortune 500 C-level employees’ there might be given corporate turnover and the size of many ‘C-suites’ - tens of thousands, maybe? So your suggestions span ~1-3 orders of magnitude less selectivity than cardinals do.
Maybe we could look a 4-star generals, of which there are under 40 total in the US? Not quite as selective, but a more similar process. (Or perhaps around as selective given the number of US Catholics, vs. US citizens.)
A sufficiently high band in the CCP could work.