It should be obvious that Islamism is going to have to include polices that are not directly drawn from the Shari’ah, but which are adopted to respond to specific circumstances and situations as they arise, in a way that advances the goals of the Shari’ah and reflects Islamic principles. Such policies will be subject to change as circumstances change.
For example, at present, one of the most destructive features of the economy is the escalating disparity between the rich and poor. This is something that we must address, and no, it will not be solved simply by implementing Zakah. It is largely the result of a systemic problem, and mandatory charity is not going to solve that problem.
People deserve to be paid a livable wage, a fair wage, a wage that corresponds to the value their work brings to a company. The massive inequality of pay between low-paid workers and executives is one of the most obvious mechanisms by which money is taken out of circulation in the marketplace. Ideally, the corporate ownership structure should be reformed, making workers shareholders; worker-owned enterprises are competitive, innovative, efficient, and on the whole, better for the economy and the community. But, at least, the pay scale needs to be reformed. The inflated salaries and bonus packages enjoyed by executives not only undermine the health of the economy, but indeed, they hinder the efficiency and profitability of a company.
Any serious Islamist party should actively advocate and promote higher, fairer wages for workers, and a limit on executive pay packages to not exceed 10-12 times the salaries of the lowest paid employees at a company.