The phrase "obvious corollary" implies that a conclusion or result is extremely clear and evident, meaning it is easy to understand and see its connection to a certain idea or statement. Full definition
But there is also the less obvious corollary, which is that once the fund is selected, as long as it keeps pumping out its embedded «advice» fee to the advisor, there is little incentive to switch funds. (business.financialpost.com)
(And by the way, it will not do to cite the younger Hayek in support of central banking when the older Hayek in Denationalisation of Money wrote about «the obvious corollary that the abolition of the government issue of money should involve also the disappearance of central banks as we know them» [page 105].) (alt-m.org)
Having first assumed that there is a basic set of fundamental laws, the temptation is to proceed from there to what seems an obvious corollary, that everything obeys the same fundamental laws. (religion-online.org)