Quoting: johndoe1. In Germany we still have to pay "Solidaritätszuschlag" (https://de.wikipedia.org/wiki/Solidarit%C3%A4tszuschlag).
This money could be given to EU Sovereign Tech Fund (EU-STF) instead.

2. Forbid (proprietary) file formats like doc, docx, ppt, pptx, xls, xlsx, rtf, tnef, ... in the EU (public and private sector). We already have ODF.
Force developers/companies of proprietary software to support ODF as first-class citizen.
Every mail server (public and private sector) should be configured to deny mails with these file attachments.

3. Force M$ to release a free converter for all their proprietary file formats into ODF. The results must be 101%😁

4. Forbid proprietary protocols and APIs.

5. Force developers/companies of proprietary software to support free SQL-Backend alternatives like MariaDB and PostgreSQL and treat them as first-class citizen.

This would be a good start... man can dream.

Edit!
Ohhh boy, I forgot the most important...
6. Forbid DirectX and Mantle.

The EU once strongarmed [External Link] Microsoft in opening up the docx format for MS office 2007 Microsoft spend the following decade trying to put that genie back into the bottle.
This was only meagerly successfull.
As such Libre office has nowadays somewhat acceptable docx support.