SP's get a monthly allowance depending on their location and if they are married.
I read recently that in USA it's $900pm for a couple, and in the UK I have a very hazy recollection it's £300pw for a couple, although don't quote me on it because it's probably wrong.
They have to find their rent, bills and food etc. out of that.
Once you move from SP to Reg Pio you lose all of that because you are no longer classed as 'representing the organisation'.