In my analogy, parents = banks and school = bank loan recipients (the federal government, if the bank has bought government bonds). The money isn't missing when

In my analogy, parents = banks and school = bank loan recipients (the federal government, if the bank has bought government bonds). The money isn't missing when it's loaned out by the bank; the bank knows when it will get it back, and can estimate the cost of getting it back early. The concept of a "modern" bank (federally-insured fractional reserve banking) is 90 years old now. Its faults are well understood and, for all the drama, it isn't high-risk for ordinary depositors.