MMIC RF Amplifier BGA2817 vs. Discrete Transistor/s Amplifier?
For small low power amplifiers, this is by far the easiest way to do the job. 

The 20mA bias current is 'paying for' the P1dB output power of 6dBm and the distortion performance output TOIP of 18dBm. If you don't need these values, then you can save power by going through the catalogues (NXP aren't the only people making these things) and tabulating power consumption versus output specs. You might find examples with better ratios, you will find examples with lower power.

Have a look at minicircuits, avago, rfmicrodevices, for monlithic broadband amplifiers.