Taxation and tax return

I'm European married to a local unemployed, with kids, working in NCR. With my tax status ME2 I'm being taxed a whopping c.22% - close to c.24% for a single parent with status S1, which imposes a little logic to my mind.

My previous global foreign employment practice bells, that I'm entitled to tax return (clearly, not all of them) for the previous fiscal year - every year NOT leaving the country, and even get VAT back in a case I'm heading abroad with my stuff purchased locally. Also, after initial high so called 'Emergency' tax paid and returned in a short while - like a couple of months - I am then being taxed significantly less than locals are.

Is there anything similar applied in the Philippines? Anyone from BIR customer service?

P.S. Lost in taxes? Cry no more, here:
ftp://ftp.bir.gov.ph/webadmin1/pdf/1601_c_tax_rates.pdf