But could it though? Since this is a change to the constitution, the amendment becomes part of the constitution, so this would be testing if the constitution is constitutional.
This is a good post made on the topic,
OK so legally speaking here is what is going to happen.
Even if the legislation goes through for EWC, the banks are still going to sue the state and the NEW OWNERS for theft (on the basis that there was no willing seller and no financial transaction). This will be the banks way of challenging the legislation in court. The courts will then pass this all the way back to the Constitutional Court who will have to decide if this law is constitutional or not. If we are lucky, and if they are clever the EWC law will be thrown out as unconstitutional (it doesn't matter if they've changed the constitution or not), if the Constitutional court rules otherwise, then the law will be chucked out. The CC may rule that the law (even with the constitutional change) still violates the principle of equality for all. So the government would then have to throw out the bill of rights as well.
If the above fails, for whatever reason, then the banks will sue the new owner on the basis of unjustified enrichment. And they will take your bond and place it upon that guy as his new legal responsibility, since when he inherited the property he ALSO inherited ALL the legal rights and responsibilities that go with it. The bond is linked to the property. If a person is deprived of that property he cannot technically be forced to pay for it (it's not like a personal cash loan - it's mortgage). The banks are under an obligation to see it restored to it's rightful owner or to place the obligations of the property onto a new owner.
Finally there will be all kinds of tax implications, since any new owner will be liable for property gains tax (which he will no doubt be unable to pay). So there will have to be many changes to tax law.
though they will be able to pursue the new owners, the new owners may also be in a position which is at odds and it will be the state who have placed them in that position. This is where contract law, credit law, property law, etc. and our rights come into play. The state may very well carry the burden they themselves have legislated. As I said, this needs to be tested and to be tested their needs to be expropriation without compensation under these conditions. We won't know until it eventually happens, where it will or not.
The most dangerous point to all this is the state advocating themselves to be the decision-maker on expropriation where the court is relegated to only practice and exercise their mandate over any disputes. Under these circumstances, the state may award property, 'to be occupied', which may only then be disputed in the court. This will cause amok, no doubt, but it may still be remedied... and it may take years.
Then property owners, individuals or entities which owns their own property, where the bank has no play other than where creditors apply. Huge risk which will result in invested parties withdrawing in total, except those who get kickbacks...
The banks, they cannot imply or give remedy to something which may or may not happen. This is where contract law meets common law.
All this may result in proper case law.
Anyway, I'm not an expert on the topic. I only really understand mercantile law.