Unfortunately I could only find this old chart [0] showing how power draw scales with frequency on Intel. However for the sake of demonstration it should be more than enough.

The chip needs around 25W at 2.5GHz and 200W at 4.7GHz. 8x more power for 1.88 times the performance. In other words Intel chips running at 2.5GHz are 4.25 times more efficient than Intel chips running at 4.7Ghz. No magic. Once Apple has chips that go this far they will suffer from the same problems.

Here is a slightly newer chart [1] that demonstrates a 57% increase in power consumption for a 500Mhz frequency gain (12% performance gain).

[0] https://www.extremetech.com/wp-content/uploads/2018/09/Clock...

[1] https://www.extremetech.com/wp-content/uploads/2016/02/power...