The ideal income tax slab rates can be:

~ Up to ₹3 Lakhs: 2% tax
~ ₹3 Lakhs to ₹10 Lakhs: 5% tax
~ ₹10 Lakhs to ₹25 Lakhs: 10% tax 
~ ₹25 Lakhs to ₹50 Lakhs: 20% tax
~ Above ₹50 Lakhs: 30% tax

Tax everyone with Low Tax rates

What do you think?

Credit to @KakulMisra