They made such a big deal about healthcare being the prime issue they were going to hit hard, hit fast, and "make America great again" that to have to move on to something else without some kind of bill is a major blow to their egos as well as their reputations and undercuts every other promise they made.  At this point I don't know what they would consider harder to have to explain to their loyal followers -- having failed at any kind of healthcare legislation, or having wiped out insurance for millions.

This may have revealed enough cracks in the party monolith, and been a public enough, long enough front-page debacle, to force them to be a little more cautious in how they handle taxes and the budget.  (That or they could try to do it all even more secretively, to avoid public reaction until it's a done deal.)