Lower tire pressure on wider rims? For a given tire width, can you safely run a lower pressure on wider rims?

Background:

My road bike can only fit up to 23 mm tires due to frame clearance, however my rims are a relatively wide 23 mm. So I was wondering if I can run a lower tire pressure than normal for a more comfortable ride without pinch flatting or damaging the wheels on bad pavement.
Running 23 mm tires on a rim width of 23 mm is insane -- your tires should be around to 40-50 mm. 

To summarize Sheldon Brown's page:

Narrow tire on wide rim = pinch flats + damage from road hazards (which is the case you are in)

Wide tire on narrow rim = sidewall damage + rim failure and bad handling

You need to get a narrower rim for the bike (or possibly do a 650b conversion if possible, so you can run decent sized tires).