How much of that $300+ billion in 'lost compliance' is just ignorance without malice? I pay my CPA a hefty sum every year to manage my tax situation - W2 worke

How much of that $300+ billion in 'lost compliance' is just ignorance without malice? I pay my CPA a hefty sum every year to manage my tax situation - W2 worker, W9 consultant, multiple business owner (musician and S-corp IT consultant), and I still get nervous around tax-time. I'm not doing anything shady, but tax-law is DAMNABLY complex and the question of 'is this a valid deductible?', 'Am I withholding enough?' and similar are regular topics of conversation with my CPA.