It's not solely due to increase in funds (I assume you mean stimulus?) I'm fairly sure corporations are getting money that would've went to other things (savings, for example).
More plausible to me is the idea that stimulus — printing new money by fiat — resulted in more cash in circulation. Corporations are like organisms that have evolved to capture and eat cash. They fed on the surplus cash, and their waistlines show it afterwards.
Meanwhile those of us with savings accounts pay the price when inflation reduces the buying power of the cash we had diligently set aside for future use.
Or you could just change your spending habits.
I guess you can blame me for not micromanaging every dollar I spend? But if I'm sitting in a drive thru grabbing a burger and fries and notice it's $5 more than it used to be, I'm probably still gonna buy the burger and fries. And I probably will still go grab one occasionally when I want it. Because saving $5 every so often isn't gonna really affect an activity that makes up a microscopic amount of my expenses (I've got fast food including coffee at 2.5% last I reviewed my data.)
But regardless I think what I'm describing is a real bit of human behavior at scale - and isn't that just economics at the end of the day?
$5 is $5... every penny counts.