According to the whitepaper, The cap was placed so Bitcoin can be a deflationary currency that resists inflation and maintains value over time.
Which is opposite of the current financial system
Where it's centralized, infinite and losses to inflation.

Theoretically it's possible but enforcing it practically is nigh if not impossible
due to it's decentralized governance.
It would take major consensus(agreement) to enable such but the community would not allow such taint.
It's like saying The government would ever stop printing money.