Actually, it wasn't that they couldn't come up with a plan that was popular enough to get a passing vote from Republicans, it was that they COULDN'T COME UP WITH A PLAN AT ALL. Remember that for all of their failed repeal attempts they have never exposed a single viable replacement plan. Their promise to "Repeal and Replace" has always been "Repeal and Trust That We Will Replace, Eventually."
The GOP plan is the Free Market. If you don't have the money to participate, then you don't. Easy-peasy. FYGM.