Three proofs: proof of identity, proof of employment and proof of financial resources.
1. Proof of identity: ID card
2. Proof of work: salary slips from social security, work certificate, salary slips, etc.
3. Proof of financial resources: vehicle Driving license, real estate certificate, securities, time deposit certificates, etc.!
The quota will be determined based on the amount and quality of the certificates you provide. Salary is only one aspect. The above three aspects can be combined to finalize your quota. Of course, it also depends on your own needs. Some People can apply for very high quotas, but they do not have such high needs.