Because that will probably impact certain politicians and other "important" stake holders who benefit from these tax laws as well.
In my opinion, every democratic country should make the following change to their laws: Politicians cannot own, or have a stake in, any commercial enterprise. Needs to be a bit refined but you get the idea.
or put it more broadly - you should be able to acquire the financials of public servants. All of it, and if they have significant others like spouse or children, their financials are also considered public. And any stakes in any company will cause that company's financials to become public (whether its a privately held company or not).
This way, there is a web of transparency so that any dodgy transactions will be definintely caught (probably by the opposing party).
It sucks that these days, its possible to "hide" the true owners of companies and stocks. Its not in the public interest to have this feature.
That may all be true, but it may also not be in the public interest to put off people who are smart enough to make a lot of money on their own and therefore independently wealthy enough not to be subject to unhealthy influences from entering public service.
Also, it would be blatantly illegal under our privacy laws to force that kind of disclosure for relations who aren't the ones making the choice but whose intimate financial details would suddenly become public, and rightly so IMHO.
In my opinion, every democratic country should make the following change to their laws: Politicians cannot own, or have a stake in, any commercial enterprise. Needs to be a bit refined but you get the idea.