Not sure who you mean by the next PM (I don't have a crystal ball), but Party politics isn't appropriate here, especially at election time (Shorten's wealth is put at $2.4 million, but who knows).
http://www.the-net-worth.com/2016/08/bill-shorten/
However they cannot change our rules and regulations, only we can. Same as we can't force them to invest here of they don't like our rules and regulations. So it is a tricky game for a politician of any persuasion to find a balance - no company would invest a cent in such a managed fund as you suggest. And we are able to simply not develop our mines etc if we don't want to (if we are happy to have our export income decrease by 40%). Without foreign investment we would have a standard of living much like the third world (where things like Medicare , pensions and unemployment benefits don't exist). I don't think further restrictions on foreign purchase of land would affect things, but already if you are a foreign resident you cannot buy an established residential dwelling in Australia, either directly in your name or through a trust relationship or company structure (you can only build new ones). However around 15% foreign ownership does seem high. So I don't think we can have it both ways, no foreign ownership could never be an alternative, and no company exists that would give away its right to make its own corporate decisions (it would probably be illegal to do so). I don't think "just give us your money and we will invest it" would be a big seller (it also ignores the fact that major investments involve foreign expertise not just money - telecoms, resource development, the new electronics...). As for things like negative gearing, even the USA is more restrictive than us - it is not really a left versus right issue. But I agree that there are always some things we could look at modifying.
However Party politics is not appropriate here, especially this week - the broader topic of foreign investment is really separate from party politics as all parties want it (whether they claim to or not). Think of the tax that governments (we) get from the $3.3 trillion in foreign investment here. Australia's total wealth was AUD$8.9 trillion as of June 2016, so it is 37% of it. We have a high standard of living because we use their money.
I would also like the world to be different in many ways, but I have to live with the reality of the way it runs.....we are a little fish in a big sea.