Re.small businesses, under a Labour government, the corporation tax rate is only being put up to 26% -- this is not particularly high, still lower than any other G7 nation currently is.
This is from the Labour Funding document that accompanied their manifesto:
Raising the headline rate to 21% from 2018-19, 24% from 2019-20 and £26% from 2020-21. Small Profits (below £300,000) rate is 20% from 2018-19 and 21% from 2020-21
Why is this is crippling to business? These rises are modest and the rate has been higher in the very recent past (28% in 2010).
The minimum wage increase is to be done by 2020, it's not an immediate rise to £10 p/h. 3 years away, it's currently at £7.50 for over 25s, this doesn't seem outlandish either. And higher pay at the lower end = reduced welfare bill due to less being paid out in tax credits and housing benefit.