It’s still satoshis but there’s no guarantee your dust will be spendable.
If you have to spend a dollar to spend a dollar then spending a dollar isn’t worth spending a dollar 
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It costs more than one cent to make a penny.
So if it cost more than one penny to make one penny does that mean you have to go in debt in order to make the Penny?
You just inflate the currency so there are more imaginary pennies.
all us currency is debt, so yes.