Very frequently in corporate environments, at least in investment banks I have known and heard of many people earning four figures a day pretty much purely beca

Very frequently in corporate environments, at least in investment banks I have known and heard of many people earning four figures a day pretty much purely because they've been allowed to carve their own niche that becomes indispensable. Ironically, the worse they are (think 5000 lines of Perl with two functions) then the less viable it is to replace them.