Nah @Burns-bass is spot on.
Only the first 2K of dividends is tax free, anything else you pay yourself gets taxed normally. If you have another job and run a Ltd. Company any dividends you take are added on top of you other salary (after the £2k but even this can be hit) and are taxed at whatever rate you are at and it bumps you to.
You really have to differentiate these massive large corporations compared to your average guy who has a small company legitimately set up as Ltd. Or you get a massively skewed view of the situation.
These normal people companies are employing people via PAYE and contributing to NI, possibly pensions as well.
All this tax break stuff that people assume is also rubbish. Yes if you need a computer for your business it can be declared as a legitimate expense, and offset against your final tax bill, but you still have to earn the money to be able to buy it.