Just spitballing.
Gig workers like us, if they get a 1099 for more than (say) $50,000 then the IRS may ask them to fill out the required form via a computer program.
But if you're a free lancer making a $150k as a writer with little overhead then yeah, you better file taxes. If you're an influencer on YouTube etc making over six figures with little cost, then yeah, you better file taxes. If you're making a lot of money from doing soft porn, then yeah, you better declare and file.
But they're really after the bigger fish. While they may be 'ordinary' citizens if they're scamming Medicare for $millions you better believe the IRS want to know.
There's a lot of money laundering for various fraud that uses Crypto exchanges etc. IRS want to find these guys.
Just curious when did JY say she was looking for 7 trillion dollars? That sounds made up to me.