You are confusing two different issues, the shutdown in 95 was caused by not passing a budget, had nothing to do with the debt ceiling not being raisedQuote from startraitor:
It happened under Clinton in 95 no big deal, everyone was made whole, federal workers even got paid for not showing up for a couple of days.
+1Quote from Scataphagos:
Even if the debt ceiling is not raised and the government shuts down, there will still be tax revenues flowing.
1st priority with those revenues is to honor the interest and principle on government securities. Therefore, no "default"... and other areas of spending get short-changed for a while. Hate to break the news, but that would NOT be "catastrophic".
Not raising the debt ceiling simply means they can no longer spend more than they take in... so it isn't like they can't spend any money - they can continue to service the current debt. Plus they have so many tricks they can use if they have to ... they just want to scare everyone so the GOP doesn't try to use the ceiling being raised as leverage to get some more spending cuts.