Income is used as a condition across many services. In government processes, it is often necessary to determine eligibility. Citizens also often need to show payslips outside the context of the government: for a mortgage loan, to rent a house, etc.
The only official governmental source of payroll data is the tax assessment notice. This data is 2 years old. If services want to rely on the current situation of a person, the burden of proof lies with the citizen. The citizen has to collect the necessary payslips and has to share them with a third party in an unsecure way (usually in a PDF via mail).
We aim to set up an ecosystem of government organizations and private companies, based on solid-technology to exchange actual income data. So we can share data in a smarter and safer way, with citizens in control of their own data. The goal is to have user-friendly processes for citizens and more efficient processes for service providers. As a result we will share less data than we do today.