When I am "leveraging" my cash value (by borrowing from it) don't I also pay interest ("to myself") that subtracts from the yield that cash value is earning?
I've been trying for a while to find any financial advisor who recommends these policies (particularly to middle class investors) who is not also an insurance agent who earns commissions selling these policies. That's not to say they don't truly believe in them, but that naturally creates a bias.
Look at it the same way you can use a HELOC on your home. When you borrow some money with a HELOC, your home does not worth less, nor does it accrued capital gain slower than if you didn't have the HELOC. Of course if you sell your home, you will have to pay the HELOC back, so get less money at the sale of your home, but the home has still the same value.
Using a loan from a permanent life insurance is the same. An insurance, or a bank is lending you money using the cash value of your life insurance as collateral. The cash value of your life insurance continues to grow the same way, loan or not. Of course you have to pay interest for the loan, the same way than for a HELOC. So if you reinvest the loan money on something that produces more than the loan interest your money is growing faster as your are getting not only the gain of the life insurance, plus the arbitrage between your investment and the loan interest. On top of that, if you used a separate lender for the loan, you may probably deduct the interest of the loan as investment expense on your tax return.
The issue with an overfunded permanent life insurance, is that the cash value the first few years is lower than the premium that you put in, because of the different front loaded fee (including commission; cost of insurance; state taxes). So you have a few years of drag. A properly set up policy should give you 75 to 85% of cash value/premium the first year, going higher every year. Around year 4 to 6 you should have 100% of your premium available in cash value, and after it should be more than that, growing at an average of 3-8% a year, depending on the product (whole life, Index Universal Life). If you take into account that drag, and if you compare investing your money directly into an investment, or putting instead your money into a life insurance, and reinvesting the loan proceed to the same investment, the cross over is between year 7 and 10. After that, the compounding effect put the later way ahead of the former.
Permanent overfunded life insurance is a complex product, that need proper planing and a good execution. But it has excellent tax advantage, it is secured from creditors, it grows steadily and does not go down with the stock market, is a fantastic wealth multiplicator for your investments and on top of it provides a financial security to your family in case of your early demise.
If you are interested on how to use it properly, you need to find an insurance agent who is knowledgeable on it. You also need to find an agent who is willing to offer it, as to properly set it up, the agent has to lower his commission. Last I would also suggest to use an agent who is also an investor him/herself who uses it too.