Germanshepherdsmum
The speculator is self employed and should pay the appropriate NIC, and also income tax on dividends (ok, the rate is low to encourage investment). No NIC, no free health care, state pension or other benefits,
My worry about Grany's sources is that their level of truth seems to be equal to Trump's.
As for tax reform, I wouldn't be surprised to find a good proportion of Conservatives think it is time our tax system was simplified.
Let's take grany's example of a speculator. If this was his only income, and knowing, thanks to GSM, that he could well be paying NI, his only concern, as is that of the PAYE worker, is that they pay the least tax required of their income.
With a simplified system where each income is taxed equally, and the system is fully progressive, they might both be paying less.
Add to that the fact that the best way to keep people honest is to keep things simple, and you could be on to a winner.