How else would you be all-inclusive? If interest rate is a measure of risk, i.e. the riskier the individual the higher the interest rate, then the most untrustworthy person can only get a loan, or access to capital, at the highest possible interest rate and at the greatest possible risk. The greatest possible risk is the situation in which the loaning party never gets their money back. If the baseline is to include everyone, it means you have to include the situation of greatest possible risk, i.e. hand out cash to someone you know won't pay it back. Intent to pay back is well and good, but risk profiling exists for a reason and microfinancing is a banking practice aimed at empowerment.

Aid, on the other hand, engenders the notion of giving and not asking for anything back. Microfinance loans are not intended to be aid.

To me, baseline trust means that if they squander their first access to capital they do not gain access again. Such a lending strategy would not raise this issue.