my grandma would call that a lazy mans load. both ways. take to little an your to lazy to lift more. take to much and your to lazy to make multiple trips.
it continues to baffle me that it's just completely normal for some people to do gargantuan shopping runs like this, i never buy more than can fit in my packpack and an extra bag..
it's a cultural thing, countries that had volatile economie and grocerie pricing at some point made people buy all their necessities in bulk, since prices would literally change multiple time in the day, crazy isn't it
When I lived in an apartment complex where we had to park very far away, I did see a lot of tenants using small carts to carry all their groceries in at once! Seemed very smart to me!