We had, and still have, both thanks to government overreaction. If you shut down production and don’t hand out money, how do unemployed people create demand for good that can’t be manufactured? (Which would be supply side failure).
the answer is it doesn’t happen. You get supply side issues when you artificially limit production (the shut downs) and then still fund the demand side. You create a situation where you artificially maintain a demand that can’t be met because you have a something like 50% producing but 100% still buying.
it’s not supply side failure, it’s a bastardization of free market principals through government overreach and control. It’s the same reason socialism always fails. When you guarantee payment on the demand side you disincetivize the supply side. When people all get the same, no matter what, engagement and effort drop and pull production down. It’s why shortages always exist in socialist and communist countries.
it can not happen though if someone is not artificially funding the demand side.
SUPPLY....SIDE....FAILURE
Both you and Friedman are liars and idiots.
I've not heard a single business complain about people having enough money to buy their products (demand). I've heard a lot of businesses complain about the inability to get enough products (supply).