> I suppose that is "in the tech field" too, as non-tech people would be happy with an $80K job where a lot are under $50K

Indeed. The median salary in America for full time employment is a little over $63K.

Edit: if the message from H1B folk earning $300k+ to voters who earn $63k on average[1] is "You need our superior intellects, you uneducated rubes", then its unlikely to be well-received, especially at a time when blaming foreigners is in vogue.

1. Or a laid-off American tech worker