Do the math, moron.
Walz (and presumably his wife) taught in Minnesota from 1996 to 2006. For teachers with 2 - 12+ years of experience like they had, how much do you think they were making annually during that time period? My guess is that they each averaged about $55k during those years, in that location, during that time period.
Here is the house listing that they bought in 1997 and sold in 2019:
12 Valley View Pl, Mankato MN, is a Single Family home that contains 3223 sq ft and was built in 1926.It contains 6 bedrooms and 3 bathrooms.This home last sold for $304,000 in July 2019. The Zestimate for this Single Family is $407,900, which has increased by $3,300 in the last 30 days.The...
www.zillow.com
It's reasonable that they either owned it at that point or had a very low balance on their mortgage, so it is fair to assume they walked away with at least $250k from that.
They raised two children in that house on that $110k annual estimated salary. After taxes and low insurance costs (most school districts have decent insurance for family for low cost), it means they walked away with about $6600/month after taxes. With a 15 year mortgage, they were paying about $2000/month. Utilities (electricity, gas, water, phone, internet, cable, etc.) would be about $600. Two cars, fuel, and insurance? Another $1300. Food for four people monthly, including one family night out per week? $1000. Clothing, recreation, events, vacations, children's sports dues/equipment, etc. for a family of four? I think a monthly average of $800 seems reasonable for four people. Home/vehicle maintenance/repairs? $200 per month for the house and two cars. That leaves about $700 extra per month.
Walz's father entered the military in order get his college paid for. That's also why Walz entered the military, as his dad urged him to do it for the GI bill. It isn't unreasonable to think they used some of that extra monthly income to help put their daughter though college.
$700/month isn't much to put in a 401k or other investments, especially if a portion of that is going into a college fund for your children and a bank account for an emergency fund.
Your claim that the guy has zero assets shows a lack of knowledge on the topic. The guy could have $500k in his bank account - not tied into investments - and that is an asset. It just isn't stock or property. As I just showed, the guy walked away with $250k+ from his property transaction five years ago. Do you think that money just disappeared even though he was living in a house for free during that time? Of course not.
The guy nor his wife were high-income earners. They had a solid middle class lifestyle with their income.