I agree there are hidden/embedded taxes, but most of them are embedded taxes in labor costs which cannot be wrung out, unless all Federal taxes are removed.
What labor-cost tax are they that make up the majority of hidden/embedded taxes? Payroll taxes are removed, FICA is removed, the cost to do the records and paperwork to comply is removed. Those are easily majority of embedded labor cost taxes.
A guy is making $50K, say, and instead of paying 20% in income taxes, he has to pay 20% in sales tax. Is he going take anything less than $50K from his employer? -- no way. So the hidden/embedded tax is still there -- it's now an embedded sales tax instead of an income tax, but it's still built into the employer's costs.