I was left £50 when I was ten by a fairly distant cousin, which my father invested in GEC shares on my behalf. I became interested in the market and was given some more shares by my father, which is when I began looking to see how the shares were performing and learning how to read company reports, balance sheets, and so on in order to gauge that.
Many foreign property owners work in the City of London and are encouraged to bring their expertise and earning power to this country because of the favourable capital tax environment. Attacking their property profit may encourage some to leave, but it would certainly deter others from coming in the first place.
The House of Commons has the undoubted rights to expel members for misconduct. This is an absolute authority which cannot be challenged in any court, as it derives from the twin concept of the High Court of Parliament being the most senior court in the land and of each House's right to regulate its own affairs.