While obtaining credit cards are not very difficult, you require a minimum level of standards to be eligible for obtaining one. Normally the providers will look for minimum level of income and certain other records from you. Most of them might also look for clean credit history. In any case the provider will see to it that you have a minimum regular income source since they have to judge whether you will be able to repay the credit.

Of course the issue can be taken up in an altogether different perspective where the question would not be whether you can pay but it will be whether you will pay. Willingness is a relative term and it could be very difficult for any of the providers to gauge the same. Requirement of income level will also vary from provider to provider. The range could be Rs,70,000 to Rs.1,80,000 or Rs.2,00,000 per annum in INR. The scenario so far as Financial India is concerned is to link up your credit limit with your income level. 

Criteria of eligibility for owning international credit card are not much different either. Most of the banks can issue single global card usable throughout the world. However the credit limit is determined on the basis of the norms fixed by the Reserve Bank of India for overseas transactions you make. Some of the banks like citi offering more financial products in india issues international credit cards to its trusted customers on the same criteria they use for domestic credit cards.