With unemployment now at 90%, the economy is essentially dead. The only ones who are active in the economy are those maintaining the government. There is probably a vast black economy, where people grow their own food and barter for things they don't have and taxes are not paid.
It sounds funny, but this is a good basis for a new start. Unlike the government, which is apparently waiting for industry to pick up, I think agriculture should be allowed to pick up. You can help start that by making sure all pieces of arable land are being used. This should lead to an agricultural surplus, which allows for reinstatement of formal markets and a modest tax income. However, to grow any further, you have to get a government that has the trust of the people. Otherwise, the surplus is converted to money and shipped out of the country. This is the hard part. It does not mean a coalition "government" where the same criminals stil have a say, but new faces and new rules, weeding out the cronies and the corrupt. Before that, lending to Zimbabwe is as useful as direct, unconditional financial support for the criminals and the cronies. It will not build trust and it will not be used to build the domestic economy.
Peter